Students should not worry about when exactly to use certain expressions.
学生不必担心什么时候使用某些特定的表达。
For the same reason, we all have similar emotional expressions like smiling and crying.
基于同样的原因，我们都拥有哭和笑这样类似的情感表达。
Some of the most popular expressions are those that are guaranteed not to offend anyone.
一些最流行的表达是那些保证不会得罪任何人的表达。
Traditional stories make use of formulaic expressions like 'Once upon a time...'.
传统故事采用“从前…”一类的套语。
You have a little time to do research, prepare technical expressions and so on.
你会有一些时间来做调查、准备技术用语等等。
我们有它们的表达式。
They're only two expressions here.
这里只有两个表达式。
表达式\1,\2,...
Each of these are also expressions.
而每个参数也是一个表达式。
Both lines use regular expressions.
两行都使用了正则表达式。
Regular expressions are complicated.
规则表达式很复杂。
Make the most of regular expressions.
最有效地利用正则表达式。
All the expressions do the same thing.
所有的表达方法都达到同一目的。
This example USES regular expressions.
这个例子使用了正则表达式。
Regular expressions are not new to SQL.
正则表达式对SQL 来说并非新事物。
Sample expressions are shown in Table 3.
样例表达式展示在表3中。
Both thus constitute regular expressions.
它们都构成了正则表达式。
So here are expressions for work and heat.
这是功和热量的表达式。
The result was expressions like the one above.
这样做的结果就是像上面那个式子那样的表达式。
But now you know the ABCs of regular expressions.
但是您现在已了解了正则表达式的基本知识。
Because we will get all of these expressions.
因为我们得到了一大堆表达式。
You use regular expressions to implement the mask.
您要使用正则表达式来实现该蒙版。
Today we explain some expressions about birds.
今天我们来讲讲有关鸟的词组。
One important element of expressions is the variable.
表达式的重要元素是变量。
Music is one of the most supreme expressions of life.
音乐是生命至高的表达方式之一。
XML tags and path expressions are still case sensitive.
XML标记和路径表达式仍然是区分大小写的。
He has great expressions, is curious and very smart.
它很有表现力，好奇，而且很聪明。
But maybe that will give you very complicated expressions.
这样可能使表达式变得很复杂。
But maybe that will give you very complicated expressions.
这样可能使表达式变得很复杂。
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