But because there's this lone pair here, it's pushing down on the other bonds, 5° so we end up with an angle of less than 109 . 5 degrees.

但因为这里有孤对，它会把其它键向下压，所以键角会小于109。

麻省理工公开课 - 化学原理课程节选

He had to angle down because she was short.

NPR: Excerpt: 'The Assassins Gallery'

Tilt the phone left or right, angle it up or down and the AR.

FORBES: Coolest iPhone Accessory, Ever

Sometimes I would sit on the floor and write while they worked, but much of the time we would simply discuss the project, trying to nail down an angle that they could actually sell to someone.

FORBES: How A YCombinator Startup Is Born: The Story Of Strikingly