used before a unit of measurement to express an area equal to a square with sides of the length mentioned （用於单位前）见方的◆Office rental is €290 per square metre. 办公室租金是每平方米 290 欧元。
( sq.) used after a number to give a measurement of area （用於数字後表示面积）平方的◆We have about 15 000 square metres of factory space. 我们拥有约 1.5 万平方米厂房。
() (all) squareif two people are square, neither of them owes money to the other 两清；彼此不欠◆Here's the $50 I owed you—now we're square. 这是我欠你的 50 元 ── 现在我们两清了。