Automotive - engine lubricating systems are of the pressure - feed type.汽车发动机的润滑系统采用压力供给式.In the present chapter, the emphasis is mainly on lubricating oils for internal combustion engines.本章着重讨论用于内燃机的润滑油.Complex calcium...
She dresses down in baggy clothes to avoid hordes of admirers.她随便穿了件宽松的衣服以免被大批的粉丝认出。Hordes of journalists jostled for position outside the conference hall.大群记者在会堂外争抢位置.The walled city was attacked by barbarian hordes.那座有...
Inbry caught me a dragonfly.英布里给我抓了一只蜻蜓.The dragonfly feeds on mosquitoes and flies.蜻蜓捕食蚊蝇.How does a dragonfly twirl and dive in flight?蜻蜓在飞行中是如何旋转和俯冲的?...