有时候说“不”是必要的。

Sometimes it is necessary to say no.

《柯林斯英汉双解大词典》

“有时候，生活会给你当头一棒。”他说。

"Sometimes life hits you in the head with a brick," he said.

youdao

“有时候，生活会给你当头一棒。”他说，“不要失去信心。”

"Sometimes life hits you in the head with a brick," he said. "Don't lose faith."

youdao

You got an extra hint here in terms of the order, so even if you had just forgotten what I said, sometimes it's not a terrible idea just to put it in the order it's written, that can give you a lot of clues as well.

其实大家还可以发现一个额外的提示，因此即使你忘了我刚才说的，有时候直接按照这个顺序,排列也不失为一个办法，这也可以给你很多提示。

麻省理工公开课 - 化学原理课程节选

And I mean, sometimes it's luck, but I say mostly it's skill, you know,

我的意思是，有时候靠运气，但是要我说，大部分还是看技术，你知道。

体育相片的魅力 - SpeakingMax英语口语达人

And when we're talking about the amplitude of the wave, we're talking about the deviation from that average level. So, if we define the average level as zero, you can have either a positive amplitude or a negative amplitude.

当我们讨论一个波的振幅时,我们说的是偏离平均位置的量,如果我们把平均位置,定义为零的话，那幅值不是,正的就是负的，有时候人们在。

麻省理工公开课 - 化学原理课程节选