Don: Time to go again to the a Moment of Science mailbag.
唐：又到了科学一刻读信时间了。
The hot stove is still burning, so let's get to this week's mailbag.
这个话题仍然相当热门，让我们来看看本周球迷信箱。
Every day he rides on a bike with a mailbag from one house to another.
每天他骑着自行车，带着邮包从一家转到另一家。
The first five are quoted from my response to the original question in the mailbag.
前五个是引自我回复读者邮件中的。
The first five are quoted from my response to the original question in the mailbag.
前五个是引自我回复读者邮件中的。
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