You must wear a life jacket.

你必须穿救生衣。

A life jacket can save your life in an emergency.

救生衣可以在紧急情况下救你的命。

On the boat, everyone must wear a life jacket.

在船上，每个人都必须穿救生衣。

Do you know how to properly wear a life jacket?

你知道如何正确穿戴救生衣吗？

Every paddler must wear a life jacket for safety.

每个划桨者都必须穿救生衣以确保安全。

Everyone wears a life jacket while kayaking.

划独木舟时，每个人都会穿一件救生衣。

Use a life jacket or other floatation divice.

记住使用救生衣或其他漂浮物。

But when you're in a boat, wear a life jacket.

不过，在船.上要穿救生衣。

We should wear a life jacket when we go diving.

潜水时我们要穿救生衣.

So what? You'll be safe with a life jacket and a helmet on.

那又怎么样？穿上救生衣和戴上安全帽你就万无一失了。