at the same time 同时=while at the time 在…时候 by the time 到…时候 after a time =after some time 过一段时间 for a time =for some time 一时,有一段时间 5.for a moment 一会...
Statistics from the Ministry of Public Security indicate that the number of registered drug addicts in China reached 791,000 by the end of last year. More than 2,200 of the nation's 2,863 counties were found to have drug users.
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