不，我是认真的，再说一次。
Say it once, say it twice, or a million times.
说一次，说两次，说无数次。
It would be an exaggeration to say I knew her well—I only met her twice.
说我非常了解她不免言过其实—我只见过她两次。
Likewise, think twice about what you say before you say it.
这好比说话之前多想两次。
Some flu experts say you should keep going for the time it takes to sing Happy Birthday twice.
有些流感专家说你应该持续洗唱两次“生日快乐”的时间。
Say you trust them as it will make them feel important and think twice before gossiping in future.
告诉朋友你对他们非常信任，这会让他们感到自己很重要，让他们以后说闲话之前要仔细考虑问题轻重。
Before the sudden influx, doctors at the clinic say they were delivering about 40 babies a week. Now it is twice that.
在怀孕难民突然涌入之前，诊所的医生说，他们每周接生大约40个婴儿，现在新生婴儿的数目翻了一番。
That is to say, the R&D center redesigned the product twice before it was launched into the market.
也就是说，在产品上市之前，研发中心要重新设计产品两次。
I'd say think twice about it. Well, you are not gonna quit school, are you?
我会说你要三思。嗯，你不会辍学的，是吗？
我想说，三思而后行。
When you're about to say goodbye, think twice, look back, and remember how hard it was to say hello.
当你想说再见的时候，请三思，请回回头，想想当初遇见的时候是多么不容易。
When you're about to say goodbye, think twice, look back, and remember how hard it was to say hello.
当你想说再见的时候，请三思，请回回头，想想当初遇见的时候是多么不容易。
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