1. pay the bill 付账单
例句：
That problem arises, in part, from uncertainty about who will pay the bill for america's subprime-mortgage collapse.
问题的来由，一方面是对谁将会为美国次级贷危机买单尚不确定。
2. expiration date 截止日期，产品有效期
例句：
Write out a gift certificate with an expiration date that coincides with your evening at a hotel.
写一张到期日和你们的旅馆之夜是同一天的礼物证书。
3. fill out 填写
例句：
Would you fill out this card and sign it?
请你把这张卡填妥并签名好吗？
4. need to do sth 需要做某事
例句：
We need to stop trade protectionism.
我们需要制止贸易保护主义。
5. as soon as possible 尽快
例句：
The key is to test your idea in the real world as soon as possible.
这一切的关键是要尽快在现实生活中检验你的想法。
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