Which of the following is the best sentence to fill in the blank in Paragraph 4?

下列哪个句子最适合填入第四段的空白处？

youdao

Each translation unit contains a sentence or paragraph that's extracted from the original document in an element called, and the translator has to fill a element with the appropriate translation.

每个翻译单元包含从原始文档中抽取的一个句子或者一个段落，原始文本放在元素中，翻译人员需要用适当的翻译文本填充元素。

youdao

Sometimes we'd fill in lower-level section headings that showed how we were going to elaborate on each section, but there was rarely any paragraph content in the first TOC review.

有时我们在每一个部分填写显示我们将如何细化的标题，但是在首次的TOC检查时几乎没有任何的段落内容。

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