You know, here's a good rule of thumb.

这是一个很好的经验。

A rule of thumb is a general estimate.

一则经验法则是一种大致的估计。

So rule of thumb, two thirds.

三分之二。

Rule of thumb is to respond within 20 minutes.

经验法则是在 20 分内回复。

A rule of thumb is a practical but approximate way of doing something.

经验法则是一种实且相似的做事方法。

The rule of thumb for packing is pack less, not more.

行李打包大致的原则就是要带得而不是带得多。

Diagnosing someone's illness is complicated but there are some rules of thumb.

诊断某人的疾病是复杂的，但有一些经验法则。

The exception to this rule of thumb, if you will, is our fingers.

上述规则对拇指不成立，如果你希望的话，手指也是如此。

There is a rule of thumb here, which I believe very useful.

这里有一条经验法则，我认为它非有。

But it's still a useful concept as rule of thumb for potential habitability.

不过这仍然是判断潜在宜居性的有法则。

According to experts, two or three times a week is a good rule of thumb.

根据专家的说法，每周最好洗两到三次。

That's usually my rule of thumb: would my parents understand this?

我的父母能不能理解？

But a good a rule of thumb is to look for ingredients you don't recognise.

但一条好的经验法则是寻找你不认识的成分。

And a general rule of thumb is about ten minutes.

一般的经验法则是大约十分。

A rule of thumb is a useful but approximate way of doing or measuring something.

经验法则是一种实且相似的做事方法或衡量方法。

A good rule of thumb is that closed questions are great for confirming information about people.

一个很好的经验就是封闭式问题比较适合来确认信息。

A pretty good rule of thumb, if you assume a particular post will linger in perpetuity.

如果认为你特别晒出的东西会永久珍藏的话，这可是条经验之谈。

For a general rule of thumb, keep your comments to two minutes or less.

一般来说，把你的评论控制在两分以内。

Dr. Laskowski and other experts have a general rule of thumb about exercising when you are sick.

针对生病时锻炼，拉斯沃斯基医生和其他专家有一套一般经验法则。

This rule of thumb works really well for dense objects like iron bars and stars. Even humans!

这个经验法则对于像铁条和恒星这样的密度大的物体非适。甚至对人类也是！