例句與造句

1. 2 oxygen is essential for life : if a person enters an oxygen deficient atmosphere he / she could collapse immediately and die if not rescued
   氧是生命的基本元素，如果人進(jìn)入缺氧的地方，他/她會立即昏迷，如果不及時救治，就會死亡。
2. It's difficult to find oxygen deficient atmosphere in a sentence. 用oxygen deficient atmosphere造句挺難的