正的用法和樣例：
例句
-
他的帽子沒(méi)戴正。
His hat isn't on straight. -
他對著(zhù)鏡子看領(lǐng)帶是否系正。
He looked in the glass to check that his tie was straight. -
他似乎把正號誤作負號了。
He seems to have mistaken a plus for a minus. -
正數的數目是無(wú)窮的。
The number of positive numbers is infinite. -
這個(gè)電荷是正電荷。
This charge is a positive charge. -
請等等！我幫你正正領(lǐng)帶。
Just a minute! Let me put your tie straight. -
我們是朝正北方向航行。
Our course was straight to the north. -
我的領(lǐng)帶系得正不正？
Is my tie straight?
