这件工作是谁干的大家都不知道的英文

that is why the machine parts were wearing away during use

• 这:    this
• 件:    piece; article; it ...
• 工作:    work; operation; w ...
• 是:    Semantics
• 谁:    who
• 干:    trunk; main part
• 的:    4次方是 The fourth po ...
• 大家:    great master; auth ...
• 都:    capital
• 不:    a block of wood
• 知道:    know; realize; be ...