operation

• If t=s, the binary operation is said to be closed .
  当TS时，二元运算叫做封闭的运算。
• This operation is called inversion and is symbolized i .
  这个操作叫倒反，用符号i表示。
• The operation itself was a model of combined work .
  这次战役本身是联合作战的一个范例。
• The operation was plain sailing .
  手术进行得顺利。
• By such a move i could be closer to the scene of operations .
  这样可使我接近工作的实况。
• The operation on this unit were finally suspended in 1957 .
  在1957年这装置终于中断操作。
• Mining operations by open-cut methods ceased in 1962 .
  露天开采的矿山作业已于1962年停止。
• No drug or operation is a panacea for all pain .
  无任何药物和手术可作为治疗疼痛的万应药。
• The new tactic was put into operation early in 1939 .
  这个新的战略是在1939年初开始运用的。