The ref attribute of element element allows you to refer to previously declared elements.

元素element的ref属性使您能够引用前面声明的元素。

youdao

They had been interested in thorium -- a radioactive element that can fuel nuclear reactors but not be processed into weapons.

VOA: special.2010.10.15

But what's really shocking is when you compare this with this, it's based upon sonnet 57 because lanthanum is element 57.

但是真正令人震惊的是,当你比较这个和这个的时候，基于诗57来看7,而正好镧是57号元素。

麻省理工公开课 - 固态化学导论课程节选

And if that's true is everything in the string, starting at the first element and removing the last element, a palindrome?

如果是相同的话,是不是字符串中的所有从第一个元素开始,并且删除最后一个元素后？

麻省理工公开课 - 计算机科学及编程导论课程节选

And also, it was envisioned to have a dance element and a theater element as well.

NPR: The Lasting Appeal of Orff's 'Carmina Burana'

There is some element of competition but there is also an element of cooperation.

CNN: PREPARING TO DO BATTLE

For QlikTech, the summit is one critical element in that journey, but just one element.

FORBES: Connect