hang-glider是懸掛式滑翔機。
hang-glider hang-glider是懸掛式滑翔機。hang-glider n. 懸掛式滑翔機
This ratio also means that an unpowered hang-glider flying at a constant speed moves 15 metres forward for every one metre it descends.這個比例也意味著一架無動力懸掛式滑翔機以恆定速率飛行時高度每下降1米，可以向前滑翔15...
