我估计他年纪在50左右。

I judged him to be about 50.

《牛津词典》

他和埃里克都像以往一样在门外等着我，所以我估计自己还不致于罪无可恕。

He and Eric both waited for me at the door as usual, so I figured I wasn't totally unforgiven.

youdao

我估计，他在五十五岁左右。

I estimated he was fifty-five years old.

youdao

They divide by n-1 to make it an unbiased estimator of the population variance, but I'm just going to show it in a simple way here.

当除以n-1表示的是对总体的,无偏估计,我在这里只是说的简单一点

耶鲁公开课 - 金融市场课程节选

But if it's on sale, I'll probably buy it.

但要是在打折，我估计就会买下来。

I like实战 - SpeakingMax英语口语达人