求翻译：首先是人尽皆知的无限循环（亦可称“死循环”）。由于空表达式null在语法上是有效的，所以我们可以把for语句的三个表达式留空，这样就会 产生不断执行for嵌套语句的效果。是什么意思？

The first is well known that an infinite loop (also known as "infinite loop"). Empty expression null in the syntax is valid, so we can put three expressions for statement is left blank, this will lead to continued implementation of the effect for nested statements.

First of all, as we all know that an infinite loop (also known as "the loop" ). Since the NULL NULL expression syntax is valid, so we can make for a statement of the 3 blank expression, so that it will perform for a nested statements.

First is the infinite loop which the human completely all knows (also may call “endless loop”).Because spatial expression null in the grammar is effective, therefore we may leave a blank the for sentence three expressions, like this can produce carries out the for nesting sentence effect unceasingly

First of all is well known in an infinite loop (also known as "infinite loop"). Because the null null expression in the syntax is valid, so we can blank three expressions of the for statement, so that you will have ongoing implementation for nested statements effect.

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