Traditionally, a hundred samples would take lab technicians more than two days to examine, but for a rat it takes less than 20 minutes.

But for John they all died.

除了约翰大家都死了。

The access codes may be another financial headache for students, but for textbook businesses, they're the future.

这些访问代码或许又是一笔让学生头疼的财务问题，但是对教科书企业来说，它们才是未来。

But for students who haven't yet done enough research, or who are still constantly changing their minds on favorite schools, the early-decision system needlessly and prematurely narrows the field of possibility just at a time when students should be opening themselves to a whole range of thrilling options.

但是对于那些还没有做足够的研究,或者心仪的学校仍在不断改变的学生来说,提前录取体系不必要地过早缩小了可能性范围,而此时学生们应该向一系列令人兴奋的选择保持开放态度。

The proposed new structure is notable not only for its height, but for its shape

拟建的新建筑令人瞩目，不仅是因其高度，也因其外形。

Now turn the question around and start looking not for what you did wrong in the past, but for what you can do to make things better in the future

现在换个角度考虑问题，开始不要去想你过去做错了什么，而考虑一下怎样才能日后做得更好。

In other words, poor and rich both over-exploit the natural world, but for different reasons.

换言之，贫穷和富裕的国家都在因为不同原因过度开发着自然世界。

Optimism remains the right starting-point, but for workers the dislocating effects of technology may make themselves evident faster than its rhythm.

乐观主义仍然是正确的出发点,但对工人来说,技术的错位效应可能会比其节奏更快地显现出来。

But for your help, I might have failed.

假如没有你帮忙，我兴许会失败。

There was dead silence but for a fly beating against the glass

当时一片寂静，只听见一只苍蝇不停地撞击着玻璃。

I'm not afraid for me, but for the baby.

我担心的不是自己，而是婴儿。

They make common cause for a few purposes, but for the most part, they pursue their own interests.

他们因为几个目的而联手，可是多数情况下，他们追逐着各自的利益。

They had agreed to get married soon, but for some unknown reason she refused to name the day.

他们同意马上结婚，可由于某些不明原因，她不肯把婚期定下来。

The first series was really bad. But for some reason the public took to it.

第一部系列剧糟透了，可是不知为何，观众开始喜欢上了它。

There's still another ten minutes of the game to go, but for practical purposes it's already over.

比赛虽然还有十分钟，但实际上等于已经结束了。

But for real trees, it's harder to uproot.

但对于真实的树而言，想要“拔根而起”会更困难一些。

But for now, the U.S. government is more focused on preventing new debris from forming than taking the trash out of orbit.

但目前，美国政府更注重防止新碎片的形成，而不是将垃圾运出轨道。

I was sure she knew the answer but for some reason she hung back.

我敢保证她知道答案，但不知为什么她不敢说出来。

But for now, she is in the grip of a blind, unfocused anger

而现在，她陷入了一种无名的愤怒之中。

He tried to speak, but for once, his voice had left him

他想说话，却一时语塞。

Research for Optimization of Radar Signal in Bypass Mode Based on Kalman Filter

基于Kalman滤波的旁路雷达信号优化研究