The filters in the on clause can contain complex queries or simple expressions.

on 子句中的过滤器能够包含复杂查询或者简单表达式。

youdao

Expression nodes support simple expressions involving arithmetic and Boolean (true or false logic) operators.

表达式节点支持包含算术和布尔(真或假逻辑)运算符的简单表达式。

youdao

Operators combine simple expressions to compose more complex expressions.

运算符将简单的表达式组合在一起构成更复杂的表达式。

youdao

It has given the world many strange expressions that are not very simple.

VOA: special.2009.01.25

All right? And if you want to do other things, whoops, sorry-- and add them together, we will get out, again, a concatenation of that string. And these will, we'll let you work through the variations, but these are the simple expressions we can use.

对不对？如果你想要进行一些别的操作，哦，对不起-是加到一块，然后结果值也是，两个字符串的链接，这些会，我们会让大家慢慢学习变量，但是这些是我们能用的最简单的表达式。

麻省理工公开课 - 计算机科学及编程导论课程节选

And in Python the expression is, operand, operator, operand, when we're doing simple expressions like this, and if I give it to the interpreter, it gives me back exactly what you'd expect, which is that value. OK?

在Python中表达式就是，运算对象，操作符，运算对象，当我们处理这样的简单表达式的时候，我把表达式传给处理器，处理器给我返回了我想要的结果，对不对？

麻省理工公开课 - 计算机科学及编程导论课程节选

Learn simple linux regular expressions.

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Mr. PHIL ROBERTS (President, Midwestern Baptist Theological Seminary): The basic Mormon tactic is we'll stay simple, we'll use the same expressions, and it gives and lends the impression of a similar if not the same belief system.

NPR: Romney Seeks to Put the Mormon Question to Rest

Ekman himself offers training from his website, or you can train yourself by studying facial expressions and identifying the basic ones using simple pictures which you look at for shorter and shorter periods of time.

FORBES: How to Spot Concealed Emotion - Body Language Quick Take #8