交通堵塞会延缓我们到达目的地的时间。
The traffic jam will ___retard our arrival at the destination.
用'智障'这个词来称呼有智力障碍的人是非常不尊重的。
It's disrespectful to refer to people with intellectual disabilities as ___retarded.
寒冷的天气延缓了混凝土的凝固过程。
The cold weather is ___retarding the curing process of the concrete.
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