脚跟向下踩向地板，脚趾指向头部的方向。

Lower heels to the floor, feet pointing straight ahead.

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当任何用户再次打开该文档时，头部激活了指向被存储的文件附件的链接。

When any user opens the document again, the header activates a link to the stored file attachment.

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用吊杆把麦克固定到鼓手头部上方两英尺的高度，并让它向下指向底鼓踏板的内沿位置。

With the mic placed on a boom stand, position the mic about two feet above the drummer's head, and point it straight down at the bass drum pedal's inner edge.

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And I'm going to do it in the following way.

再一次开始，我们指向列表的头部。

麻省理工公开课 - 计算机科学及编程导论课程节选