The portable lifebelt provided by the invention has small volume and can be carried conveniently as the gas-bag belt length can be regulated according to waistline of users;
本发明提供的一种便携式救生带，体积小，携带方便 ，可根据使用者的腰围调节气囊带长度；
2
The fact I was wearing a seat belt saved my life.
我系着安全带，幸免于难。
《柯林斯英汉双解大词典》
3
Paradoxically, while the temperatures required for liquid water exist only in the inner solar system, the key building blocks of life, including water itself, occur primarily beyond the asteroid belt.