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这条线是红色的。
zhè tiáo xiàn shì hóng sè de。
This line is red.
这根线太长了。
zhè gēn xiàn tài cháng le。
This line is too long.
我在邮局排队。
wǒ zài yóu jú pái duì。
I was standing in line at the post office.