词汇	吸出落差水头
释义	吸出落差水头 draught head
随便看	keep one's temper keep one step ahead keep one step aheadof keep one step ahead of keep one's thumb on keep one's tongue between one's teeth keep one's trap shut keep one's voice down keep one's way keep one's weather eye open keep one's weather weather-eye open keep one's weather weath-eye open keep one's weathetr eye open keep one's wicket up keep one's wits about one keep one's word keep one's words keep on friendly terms keep on frighting keep on good terms keep on good terms with keep on good terms with sb keep on ice keep on-ing keep on its feet