move silently 中文意思是什麼
move silently
解釋
潛行-
The gliders suck in and shoot out water to change their buoyancy and move up and down. small wings on their missile - like bodies create lift to move horizontally. without a noisy propeller or engine, the gliders run silently and on very little power
這種水下滑翔機長6英尺1 . 83米重100磅45 . 4公斤，依靠吸進吐出海水改變浮力，並藉助側翼產生水平動力。
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