提供了聊天功能之后，检查某人是否上线就很简单了，因为许多聊天产品已经提供了上线感知功能。
Once you provide access to chat, noting whether someone is present is a small step since many chat products already provide online awareness capability.
看着喜欢的人上线，却不能主动和他聊天，你们知道这种说不出的痛苦么？
Looking at the person who likes the line, but can't take the initiative to chat with him, do you know the pain that this can not say?
回家就在上网，不聊天，不上线，看电影，我觉得是在浪费时间或者准确一点，打发时间，打发自己。
Home in Internet, don't chat onward, watching movies, I think it is a waste of time or accurate point, to kill time, sent himself.
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