例句與造句

1. respiratory protective devices for self-rescue-self-contained closed-circuit compressed oxygen breathing apparatus incorporating a hood-requirements, testing, marking
   帶面罩的自救用自帶閉路式壓縮氧氣呼吸器的呼吸防護(hù)
2. It's difficult to find oxygen breathing in a sentence. 用oxygen breathing造句挺難的