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1.happen to 碰上；遇到
Please drop in at my office when you happen to be free.
如果你碰巧有空的话，请到我的办公室来。
2.define ... as... 将...定义为...
We can define a joke as something you say that causes laughter.
我们可以把笑话定义为能够引发笑声的话语。
3.less than 少于
At this stage, you begin settling for less than what you deserve.
在这个阶段，尽管你得到的比应得的要少，但你还是勉强接受。
4.connect to 连接到，相连
Next, connect to the database.
接下来，连接到该数据库。
