During her first voyage to the sea, the breakdown of the ship's engine left her at the mercy of the rough sea.
在第一次出海航行时，由于发动机出现了故障，这艘船在大海中有风浪任意摆布。
2
Your engine sounds a bit rough you'd better have it checked.
你的发动机声音有点不正常——最好检查检查。
3
Based on the analysis of wear particles of diesel engine, a pattern recognition method of the wear mode of diesel engine was originally put forth, by combining rough sets theory and fuzzy theory.