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- 他的帽子没戴正。
His hat isn't on straight.
- 他对著镜子看领带是否系正。
He looked in the glass to check that his tie was straight.
- 他似乎把正号误作负号了。
He seems to have mistaken a plus for a minus.
- 正数的数目是无穷的。
The number of positive numbers is infinite.
- 这个电荷是正电荷。
This charge is a positive charge.
- 请等等！我帮你正正领带。
Just a minute! Let me put your tie straight.
- 我们是朝正北方向航行。
Our course was straight to the north.
- 我的领带系得正不正？
Is my tie straight?
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