抽气泵的排气管应该导向室外空旷处或导向一座通风橱.The pump exhaust should lead to the open air or a fume hood.设计了一套硅片专用真空夹紧装置,包括夹紧装置和微型无油真空抽气泵.A vacuum clamp equipment used for holding Si wafer is designed in this paper....
我觉得蹲监狱对于哈里会是件很可怕的事。I think prison is going to be a scary thing for Harry.他弯腰蹲下，把小狗们都抱到自己腿上。He bent to a squat and gathered the puppies on his lap.他蹲得距门尽可能近.He crouched as near to the door as he could....
The band have a droll sense of humour.这个乐队有一种滑稽古怪的幽默感。droll tricks好笑的把戏He is so droll, that Samson.参孙真会开玩笑.He looked at her with a droll sort of awakening.他用一种古怪的如梦方醒的神情看着她....