The floor was level, but the ceiling sloped toward his head.

地面平平坦坦，但是天花板向他的头部倾斜。

《柯林斯英汉双解大词典》

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Your head should be up, your back straight, and shoulders level.

你的头应该抬起来，你的背部笔直，肩膀水平。

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Afghan President Hamid Karzai and Pakistani President Asif Ali Zardari flew into Tehran, at the head of high-level delegations, to discuss a series of problems, including drugs, terrorism and Islamic extremism.

VOA: standard.2009.05.24

She added that the Foreign Office has raised the matter with the Chinese twice at ambassadorial level, once at deputy-head-of-mission level, and that the consular director has also raised it with senior Chinese consular officials visiting London.

WSJ: U.K. Raises Brit's Death in China Talks

Harlequins prop Ceri Jones also boosted his chances by showing he can acquit himself at tight-head prop as well as loose-head at Test level.

BBC: Jenkins hints at World Cup places

One new technique being used by some neuroeconomists is transcranial magnetic stimulation, in which a coil held next to the head issues a low-level magnetic pulse that temporarily disrupts activity in a certain part of the brain, to see if that changes the subject's preferences for example, for a particular food and how much he is willing to pay for it.

ECONOMIST: Neuroeconomics: Do economists need brains? | The