periodic

periodic是英語形容詞，基本含義為“階段性的，定期的”，發音為英 [ˌpɪəriˈɒdɪk]，美 [ˌpɪriˈɑːdɪk]。其詞源可追溯至拉丁語“periodicus”，經法語演變而來，核心詞根“period”意為周期或時期。

該詞廣泛套用於多學科領域。在化學中特指元素周期表（periodic table）及周期律（periodic law）；數學與物理學中描述周期性現象，如周期函式（periodic function）和周期運動（periodic motion）；工程領域則用於定期檢修（periodic inspection）等場景。醫學、天文學及管理學也借其表達規律性事件，如周期性流行（periodic epidemic）和定期審查（periodic review）。

19世紀，俄國化學家門捷列夫提出元素周期律並創立周期表，使“periodic”在科學領域的使用顯著擴展，逐步形成涵蓋周期性規律的跨學科術語體系。

基本介紹

• 外文名：periodic
• 詞性：形容詞
• 發音：英[ˌpɪəriˈɒdɪk]美[ˌpɪriˈɑːdɪk]

單詞釋義

英 [ˌpɪəriˈɒdɪk] 美 [ˌpɪriˈɑːdɪk]

adj. 階段性的，定期的；（化學）元素周期表的；（修辭）完整句的

短語搭配

periodic table 周期表

periodic structure 周期性結構；周期組織

periodic wave 周期波

periodic inspection 定期檢修

periodic maintenance 定期維修；定期保養

periodic change 周期變化；周期變更

periodic law [化]周期律；門捷列夫氏定律

periodic function 周期函式

periodic motion 周期運動

periodic review 定期檢查；按期盤點

periodic system 周期系，周期系統

periodic acid 過碘酸；高碘酸

periodic table of elements 元素周期表

periodic error 周期誤差；周期性誤差

periodic time [計]周期，周期時間

periodic inventory 定期盤存

periodic cleaning 定期清理，定期清洗

periodic report 定期報告

雙語例句

• Periodic checks are carried out on the equipment. 設備定期進行檢查。
• Periodic checks are taken to ensure that high standards are maintained. 進行周期性檢查以確保高標準得以維持。
• So is my version of the periodic table wrong? 那么我的元素周期表是錯的嗎？
• This kind of periodic orbit is only a phase in a comet's life. 這種周期性軌道只是彗星生命中的一個階段。
• Periodic changes in Earth's orbit could affect Earth's climate. 地球軌道的周期性變化會影響地球的氣候。
• Early versions of the periodic table had gaps, missing elements. 早期的元素周期表有空缺，缺少一些元素。
• Professor Harrison, were you saying that the periodic table is predictive? 哈里森教授，你是在說周期表是可以預測的嗎？
• Melanomas are more common if you have periodic intense exposure to the sun. 如果你定期暴露在強烈的陽光照射下，黑色素瘤會更常見。
• The structure of the periodic table appeared to limit the number of possible elements. 元素周期表的結構似乎限制了潛在元素的數量。
• There is this group of about half a dozen right down the diagonal middle of the periodic chart. 沿著周期表的對角線的中間有大約包含六個元素的元素組。
• Of course, it was an element the periodic table let us to expect existed before anyone had found it or made it. 當然，它在被人發現或製造前，就是一種元素周期表使得我們期待其存在的元素。
• In fact, subsequent work has shown that in a periodic table, elements should not be ordered strictly by atomic mass. 事實上，後來的研究已經證明，在元素周期表中，元素不應該嚴格按照原子質量來排序。
• By isolating organisms completely from external periodic cues, biologists learned that organisms have internal clocks. 通過將生物體與外部的周期信號完全隔離，生物學家了解到生物體有內部的生物鐘。
• Online time has doubled since 2006, and social media use has moved from a periodic activity to a daily one in the same period. 自2006年以來，上網時間翻了一番，而與此同時，社交媒體的使用也已經從定期活動變成了日常活動。
• Bone growth in reptiles is periodic in nature, producing a series of concentric rings in the bone, not unlike the growth rings of a tree. 爬行動物的骨骼生長在本質上是周期性的，在骨頭上產生一系列的同心圓，就像樹木的年輪一樣。
• Yet Rampino and others question one of the traditionalists' basic assumption: the periodic occurrence of glaciation throughout Earth's history. 然而，蘭皮諾和其他人對傳統主義者的一個基本假設提出了質疑：在整個地球歷史中，冰川期是周期性發生的。
• In places, the water table is declining at a rate of a meter a year, necessitating the periodic deepening of wells and the use of ever-more-powerful pumps. 在一些地方，水位正以每年一米的速度下降，需要定期加深井並使用更強大的水泵。
• Warmer sea temperatures caused by climate change and periodic El Nio events have caused large areas of coral to be wiped out in so-called "bleaching" events. 氣候變化及周期性的厄爾尼諾現象引起的海水變暖，已經造成了大面積的珊瑚礁在所謂的“漂白”事件中消失殆盡。
• Consequently, the timing and rhythms of biological functions must closely match periodic events like the solar day, the tides, the lunar cycle, and the seasons. 因此，生物功能的時間和節奏必須與太陽日、潮汐、月球周期和季節等周期性事件密切契合。
• However, when diatoms are observed under constant conditions in a laboratory, they still display periodic behavior, continuing to burrow on schedule for several weeks. 然而，當在實驗室的恆定條件下觀察硅藻時，它們仍然表現出周期性的行為，繼續按計畫挖掘幾個星期。
• Both chemists were sufficiently farsighted to leave gaps where their analyses of periodic physical and chemical properties indicated that new elements should be located. 這兩位化學家都非常有遠見，他們對周期性的物理性質和化學性質進行分析，並在預示應該出現新元素的地方留下了空位。
• Periodic surges of intense Iranian economic nationalism must be understood partly as a reaction to the close relations between British business in Iran and the British government. 伊朗強烈的經濟民族主義的周期性高漲，一定程度上必須被理解為對英國在伊朗的商業與英國政府之間密切關係的反應。
• Does that explain why it was missing in the periodic table? 這能解釋為什麼它在元素周期表中缺失了嗎？
• For example, tellurium comes before iodine in the periodic table, even though its atomic mass is slightly greater. 例如在元素周期表中，碲排在碘之前，儘管它的原子質量略大一些。
• Let's continue our discussion now by talking about orbits, especially those of the so-called periodic-orbit comets. 現在我們繼續討論，談談軌道，特別是那些所謂的周期軌道彗星。
• The close correspondence between the observed properties of gallium and Mendeleyev's predictions for eka-aluminum lent strong support to the periodic law. 鎵表現出的性質與門捷列夫對“鋁下元素”的預測密切對應，為周期律提供了有力的支持。
• Esplanade Company uses the periodic inventory method. 散步路公司使用定期盤存方法。
• The bordereaux are periodic reports or settlement statements. 業務報表是定期報告或和解聲明。
• The dangerous value of the control parameter led to surf-riding and the domain of periodic motion and surf-riding given. 控制參數的危險值導致滑行，並給出了周期性運動和滑行的範圍。
• Why do we call it the Periodic Table? 為什麼我們叫它周期表？