Otherwise, the shell interprets the trailing text as part of your variable name — and most likely returns a null value.

否则，Shell将把尾随文本解释为变量名称的一部分——并且很可能返回一个空值。

youdao

In the next part of this article, we'll look at a more robust solution using the find command to generate suitable null-delimited output.

在本文的下一个部分中，我们将查看另外一个更加健壮的解决方案，即使用find命令生成合适的以null字符串分隔的输出。

youdao

The capability is checked against null in the first part of the if clause.

功能是根据 if 语句的第一部分获得的。

youdao

As a result, Botha has turned to the courts in an attempt to have his Bulls contract declared null and void, while Sarfu has not confirmed whether his Springbok contract is part of his court application.

BBC: Strike threat to Springbok tour

One need not agree with all of this book's musings or interpretations -- particularly the notion of nullification, whereby a group of like-minded people can declare a law null and void for them -- to appreciate its plea for a greater sensitivity on the part of our political establishment to those with unconventional beliefs.

FORBES: Fact and Comment