Also has three optional sub-elements.

还有三个可选的子元素。

youdao

Id, price and quantity - sub-elements of item.

price和quantity——项目的子元素。

youdao

An RSS file is made up of a element and its sub-elements.

RSS文件由一个元素及其子元素组成。

youdao

What often is referred to as a system actually does not pass as "system", but rather comes out as loosely coupled sub-systems and elements of general education.

UNESCO: ����

In turn, each of these sub-systems encompasses separate components, which include distinct elements and so on and so forth.

FORBES: The Case for Climate-Change Alarmism