shipping propeller的用法和樣例：
例句
- The ship's propeller churned the waves to foam.
那條船的推進(jìn)器把水浪攪動(dòng)得泡沫四起。 - The depicted type is found in bacteria such as E. coli and Salmonella, and rotates like a propeller when the bacterium swims.
上圖這種鞭毛是類(lèi)似大腸桿菌和沙門(mén)氏菌這樣的細菌所有的，在細菌游動(dòng)時(shí)它會(huì )像推進(jìn)器一樣旋轉。
