period of time造句
271. So when a thread is put into a wait state waiting for something to happen, it incurs a wait of some period of time.
272. Thereby, an antifouling stainless steel member improved in flaw resistance and also keeping the antifouling property against water stain or the like over a long period of time is provided.
273. When it is struck , a tuning pure tone pitch over a long period of time.
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