Any second, I expect that he'll pull a whistle from his pocket and blow it.

每时每刻，我都觉得他下一秒钟就会从口袋里掏出个哨子来吹一吹。

Just blow this whistle and hope a bear doesn't eat you!

就吹这个哨子，而且希望不会有熊会咬你！

The whistle makes a sound because you blow into it.

因为你向里面吹气，所以哨子发出声音。

If it fails to inflate, or you need top up the air, blow into this tube. A light and whistle are provided to attract attention.

如果充气失败，或者你需要补充充气，向管子直接吹气即可。一个照明灯和哨子供你引起注意使用。

We stood with a very large crowd, waiting for the manager to blow the whistle.

还有一大群人站在那儿等着经理吹哨。