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

这很好的经验。

A rule of thumb is a general estimate.

则经验法则种大致的估计。

So rule of thumb, two thirds.

三分之二。

Rule of thumb is to respond within 20 minutes.

经验法则在 20 分钟内回复。

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

经验法则种实用且相似的做事方法。

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

行李打包大致的原则就要带得而不带得多。

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

诊断某人的疾病复杂的，但有些经验法则。

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，手指也如此。

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

这里有条经验法则，我认为它非常有用。

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

不过这仍断潜在宜居性的有用法则。

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.

但条好的经验法则寻找你不认识的成分。

And a general rule of thumb is about ten minutes.

般的经验法则大约十分钟。

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

经验法则种实用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.

很好的经验就封闭式问题比较适合用来确认信息。

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，这可条经验之谈。

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

般来说，把你的评论控制在两分钟以内。

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套般经验法则。

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

这经验法则对于像铁条和恒星这样的密度大的物体非常适用。甚至对人类也！