关掉灯，他发出了事先约好的信号。
两人事先约好：决不为上学之事影响其他工作。
The two of them both agreed that going to school should in no way affect their work.
王小红刚刚安顿好了，就去大街上寻找事先约好的接头同志，不料，来和她接头的不是别人，正是许挺。
WangXiaoGong just settle well, go to the street looking for about good comrade joint in advance, and, behold, to her joints and not others, it is XuTing.
一天晚上，当肖尔先生和佐藤女士约会的时候，他的老板如两人事先约好的计划打来电话，要求肖尔先生到办公室测试一下某种电话会议系统。
During a date with Ms. Sato one evening, his boss phoned Mr. Shaw on the pretext of asking him to stop by the office to test some teleconferencing gear.
你如果想拜访某个人,或是想请某人做什么事情,你最好事先与他约好。
If you want to visit somebody or invite somebody to do some-thing, the best way is to make an appointment with him in advance, because most westerners often keep a strict personal schedule.
我事先打电话约好了。
如果有人事先没有约好，那你一直站着直到你决定是否继续交谈下去。
When someone shows up unannounced keep standing until you decide if you want the conversation to continue.
如果有人事先没有约好，那你一直站着直到你决定是否继续交谈下去。
When someone shows up unannounced keep standing until you decide if you want the conversation to continue.
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