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

这是个很好的验。

A rule of thumb is a general estimate.

验法是种大致的估计。

So rule of thumb, two thirds.

三分之二。

Rule of thumb is to respond within 20 minutes.

验法是在 20 分钟内回复。

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

验法是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，但有些验法。

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

上述规对拇指不成立，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.

这里有条验法，我认常有用。

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用法。

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.

但条好的验法是寻找你不认识的成分。

And a general rule of thumb is about ten minutes.

般的验法是大约十分钟。

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

验法是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.

个很好的验就是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.

如果认你特别晒出的东西会永久珍藏的话，这可是条验之谈。

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验法。

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

这个验法对于像铁条和恒星这样的密度大的物体常适用。甚至对人类也是！