envelope是不是可数名词

envelope是可数名词,复数为envelopes ，意为信封，塑料封套。

例句A courier was despatched with two sealed envelopes.

信使受命递送两封封讫的信。

I like to keep a few envelopes about in case I need them.

我喜欢在手头留存一些信封，以备不时之需。

We\'ve gone through all those envelopes I bought last week.

我们用完了我上周买的所有的信封。

Have you ordered in enough envelopes this month?

这月你订足信封了吗？

There should be some envelopes floating around somewhere.

我这里应该有些信封。

We can get red envelopes in the Chinese New Year.

在中国新年我们会得到红包。

Many children receive red envelopes during Chinese New Year.

很多小朋友农历新年时收到很多红包。