Therefore, careful selection of appropriate treatment technology is the key for wastewater treatment.
因此，慎重选择适当的处理工艺是污水处理设计的关键。
After careful selection, he finally chooses a position just before the deadline.
经过认真地筛选，他终于在报名截止期限之前选好了报考职位。
After careful selection, he finally chooses a position just before the deadline.
经过认真地筛选，他终于在报名截止期限之前选好了报考职位。
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