慢速英语:Don't Be Caught With Your Pants Down

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1. consider vt.考虑; 认为
例句：There are two components to consider.
有两个组成部分需要考虑。

2. tighten vt. 收紧; 变紧（使）
例句：Will you tighten this screw ; it' s very loose.
你把这个螺丝拧紧好吗，它太松了。

3. replace vt.代替; 替换
例句：We undertake to replace any product not up to the specifications.
产品不合规格，保证退换。

4. calm adj.平静的; 镇定的; 安静的
例句：Keep calm, whatever happens.
不论出什麽事都要保持镇静.