And some of these signs are not always easy to see.

VOA: special.2009.01.06

And it is not always easy to answer, because sometimes they do not always make their deepest or most fundamental questions altogether clear.

答案并不总是简单的，因为有时候它们不总是,让那些最深刻和最基础的,问题一起清楚地呈现。

耶鲁公开课 - 政治哲学导论课程节选

it's not always easy or possible

做起来没那么简单，也不太可行，

临时抱佛脚？也做过 - SpeakingMax英语口语达人

Parents know a nightly bedtime is not always easy to enforce.

VOA: special.2010.06.09

You always want to check your signs at the and because it's so easy to get the sign wrong, and I was hoping that it was right here because I wasn't sure, but it turned out to be right.

我们完成计算时，一定要记得检查符号,因为很容易弄错符号，刚才我就不太确定,是否弄错了符号，检查发现没有问题。

麻省理工公开课 - 热力学与动力学课程节选

Their job is not always easy.

VOA: special.2009.03.19

That's why we always talk about irreversible expansion, because it's easy to write down an irreversible expansion.

这就是我们总是,讨论不可逆膨胀的原因，因为它,比较容易描述。

麻省理工公开课 - 热力学与动力学课程节选

And because there is an explicit relationship between u, delta u, q and w, you can always find the easy way to derive the change in internal energy or the heat or the work.

因为Δu，q和w之间,有明确的关系，一般来说,内能或热或功的变化,易于计算。

麻省理工公开课 - 热力学与动力学课程节选