我和母亲走在前面，我的妻子和儿子走在后面。
My mother and I walked in front, followed by my wife and son.
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她看见她们一个走在前面，一个紧紧的跟在后面。
Now she could see that one was in front and one close behind.
狐狸走在前面，老虎紧紧的跟在后面。
The fox went ahead, and the tiger followed closely.
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