风向是用箭头表示的。

Wind direction is represented by arrows.

《牛津词典》

有些人喜欢用箭头，箭头指向电负性更强的一端。

Some people like to use an arrow and the arrow points in the direction of the more electronegative end.

youdao

我用箭头突出了这些定义。

I used the arrows to highlight definitions.

youdao

Some people like to use an arrow, and the arrow points in the direction of the more electronegative end.

也可以用箭头，箭头指向,带负电的一极。

麻省理工公开课 - 固态化学导论课程节选

And I am going to let this arrow somehow indicate the value of the incident energy.

我将用这个箭头,来揭示,入射能量的值。

麻省理工公开课 - 固态化学导论课程节选

Instead if we want this pointer to represent the address of something in as much as it points at that address let's just draw an arrow.

如果我们想要让这个指针表示,数据的地址，它指向的地址,我用一个箭头表示。

哈佛公开课 - 计算机科学课程节选