Optg
abbr. operating 操作的，运转的，营业上的
🗣️ 情景例句
I care about the practical things.
我关心实用的事物。
You can't take it back!
说话算话！
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。