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841 、 埋头铆钉 countersinkheadrivet 842 、 埋头锥孔 countersink 843 、 埋头螺栓 countersinkheadbolt 844 、 埋头螺丝 countersinkheadscrew 845 、 埋头钻 countersinkdrill 846 、
After breakfast the next day, the children were pleased to learn that Grandfather was also going to the QuestMaster meeting. C.D. had invited his uncle John and Mr. Alden to take a peek at Ringmaster II. Grandfather, Violet, and Soo Lee sat waiting i
backset, n 挫折,倒退;涡流,逆流=check 【记】backset=set back-倒退 【反】hike(n 远足,增加)
AA: I'm Avi Arditti with Rosanne Skirble, and this week on Wordmaster: the second part of our conversation with Erin McKean, editor-in-chief of American dictionaries for Oxford University Press. RS: We start by talking about the proper way to get to
Keeping Time With Quartz Most people know that wrist watches commonly contain quartz. In fact, if you wear a watch, chances are its a quartz watch, since most watches is made today use quartz. But, you may not know what quartz has to do with keeping
The 1.5-kilogram drones, made of carbon fiber, are equipped with an infrared cameras, allowing them to see in the dark. They will also be fitted with radar systems and communications antenna to extend monitoring capabilities. But the truly outstandin