大家都搜：
先行作业
1、previous one───前一个；上一个
2、previous research───以前的研究
3、previous days───前一天
4、previous───adj.以前的；早先的；过早的；adv.在先；在…以前
5、strabismus operation───[医]斜视手术
6、operation management───运营管理；经营管理；Cao作管理
7、operation───n.Cao作；经营；[外科]手术；[数][计]运算
8、previous year───前一年；[经] 上年度，以前年度
9、commercial operation───[经] 商业经营
1、my previous operation practice, following I will talk about some aspects to where we should pay attention.───下面笔者就自己在实践Cao作中的使用体会来谈谈网页设计时应该考虑哪些问题。
2、foreign body giant cells are seen just to the right of center where there is a bluish strand of suture material from a previous operation.───两个异物巨细胞位于中央偏右，同时可见以前手术留下的浅蓝色的缝线。
3、Gets a value indicating whether the user can undo the previous operation in a text box control.───获取一个值，该值指示用户在文本框控件中能否撤消前一Cao作。
4、message classes are used to retrieve messages generated by a previous operation such as a command call.───消息类用于检索前一个Cao作(比如一个命令调用)生成的消息。
5、True if the user can undo the previous operation performed in a text box control; otherwise, false.───如果用户可以撤消在文本框控件中执行的前一Cao作，则为true；否则为false。
6、Gets a value indicating whether the user can undo the previous operation.───获取一个值，该值指示用户能否撤消上一个Cao作。
7、Methods To analyse the clinical materials of the 31 cases of patients with previous operation failure of lumbar disc herniation.───方法回顾分析我们收治的31例腰椎间盘突出症手术失败患者的临床资料。
8、The message classes are used to retrieve messages generated by a previous operation such as a command call.───消息类用于检索前一个Cao作（比如一个命令调用）生成的消息。
9、Value typically obtained as an output parameter from a previous operation.───值，通常作为上一个Cao作的输出参数获取。
1、Memory is very full. The previous operation is no longer undoable.