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1·Four squared equals 16.

4的平方等于16。《牛津词典》

2·The board is squared off ready for the game.

板子上已经画好了方格，可以开始下棋了。

3·His goal squared the game 1–1.

他进了一球，使比赛打成1:1平。《牛津词典》

4·Bruno squared himself to face the waiting journalists.

布鲁诺挺起胸膛面对等候的记者。《牛津词典》

5·The boat is rounded at the front but squared off at the back.

这条船船头是圆的，船尾则是方的。《牛津词典》

6·The interests of farmers need to be squared with those of consumers.

农场主的利益需要同消费者的利益相一致。《牛津词典》

7·They must have squared the mayor before they got their plan underway.

一定是买通了市长，他们的计划才得以实施。《牛津词典》

8·I squared it with Dan, who said it was all right so long as I was back next Monday morning.

我就此事征求过丹的许可，他说只要我能在下周一上午回来就行。《柯林斯英汉双解大词典》

9·It is calculated by dividing a person's weight in kg by their height in meters squared, and a BMI of between 19 and 25 is considered healthy.

它的计算方法是用一个人的体重（公斤）除以身高（米）的平方，BMI 在19到25之间被认为是健康的。

10·The fearless rodent proved he was no scaredy-cat as he astonishingly squared up to his large opponent and refused to budge.

这只无所畏惧的啮齿动物证明了自己并不是胆小鬼，它向体型庞大的对手摆出了惊人的架势，并拒绝让步。

(1)mean squared error均方误差