Necessariness
必要性
🗣️ 情景例句
Thanks.
谢谢。
Certainly not.
一定不是。
As a shipbuilder, Cockerell was trying to find a solution to the problem of the wave resistance which wastes a good deal of a surface ship's power and limits its speed.
作为一个船舶技帅，科克雷尔在寻找解决波浪阻力的方法，因为波浪阻力浪费掉了船在水面行驶的大量动力，从而限制了船的速度。