hydroplane
n
1 light motor boat with a flat bottom, that can travel fast over the surface of the water 機動平底快艇.
2 device on a submarine enabling it to rise or descend (控制潛艇升降的)水平舵.
??? 情景例句
She majored in math and physics at university.
她在大學(xué)里主修數(shù)學(xué)和物理。
Adversity successfully overcome is the highest glory.