Girls become sexually mature earlier than boys.

女孩比男孩性成熟早。

《牛津词典》

Girls generally reach sexual maturity two years earlier than boys.

女孩子通常比男孩子早两年达到性成熟。

《柯林斯英汉双解大词典》

He arrived earlier than usual.

他到得比往常早。

《新英汉大辞典》

Studies show that some American Robins are appearing in their nesting areas two weeks earlier than thirty years ago.

VOA: special.2009.05.12

And if you look at the whole story that he tells, that really means quite soon after the fall of the Mycenaean world, probably maybe a century earlier than what Finley suggests.

如果你关注一下他所描述的内容,就会发现那是在迈锡尼世界瓦解之后,可能要比芬利的观点还要早一个世纪

耶鲁公开课 - 古希腊历史简介课程节选

You could absolutely implement something more interesting and something even more animated like we saw on Wednesday or even earlier today, but it takes a little more than just a format string.

你绝对可以实施一些更有用的,和一些更愉快的东西，像我们周三或今天早些时候,看到的，但它不只是,格式化字符串。

哈佛公开课 - 计算机科学课程节选

To upgrade, customers should call 1-800-DIRECTV no earlier than three weeks before their market's confirmed launch date.

ENGADGET: blogger-avatar

Then it emerged that the temperature had begun rising centuries earlier than carbon dioxide.

WSJ: Matt Ridley on Confirmation Bias and Global Warming | Mind & Matter

That is easier to do than having to go to bed earlier than normal.

WSJ: To Avoid Jet Lag This Summer, Travel Like a Scientist