Defining relative clauses such as these specify which noun we are talking about.

像这些句子就是限定性定语从句了，限定了我们所讨论的名词是哪个。

For defining adjective clauses, no comma.

用于定义形容词从句，没有逗号。

In England they call this, I believe, a defining clause.

在英国，他们称之为，我相信，一个定义条款。

Now, generally speaking, when you have an identifying or defining clause with no commas, you're going to use " that" .

现在，一般来说，当你有一个没有逗号的识别或定义子句时，你将使用 " that" 。

There's more threat of backbiting and there are only human resources with no defined pet clause to settle ruff reports and hissy fits that others find un-meow-sing.

同事间关于宠物会有更多“纷争”，让人啼笑皆非。唯有“人”力资源部门不必如此，因为他们没有明确的“宠物”条款。