1. let out a whistle

吹口哨

eg. And with that he let out a whistle, "Here, Dolly! " he called.

说着，他吹响一声口哨，“出来， 多利！”他喊道。

eg. I promised my girlfriend a gold necklace for her birthday, but when the jeweler quoted a price for one we liked, I let out a long, low whistle.

我答应过我女朋友在她生日时送她一串金项链，但当珠宝商报出我们喜欢的一串的价格时，我吹了一个又长又低的口哨。

2. seat belts

（飞机、汽车等的）安全带

eg. Every time we fly, we are reminded to put on our seat belts and of how to use life vests.

每次搭乘飞机，乘务员都会提醒乘客系好安全带，并教会乘客如何使用救生衣。

eg. Seat belts protect drivers and passengers in case of accident. They also reduce the effect of a crash on the body.

万一发生事故时，座椅带能保护驾驶员和乘客，同时减少碰撞对人体的冲击。

3. put on

穿上；上演；增加；假装；使…上场

eg. She put on her coat and went out.

她穿上外套，出去了。

eg. Maximo put on a pair of glasses.

马克西莫戴上了一副眼镜。