She needed a clear head to carry out her instructions.

她需要一个清醒的头脑来执行命令。

《柯林斯英汉双解大词典》

Before you start on these chapters, clear your head.

在你开始这些章之前，先理清思路。

《柯林斯英汉双解大词典》

You'll need to keep a clear head for your interview.

你面试时需要保持清醒的头脑。

《牛津词典》

The ball appeared to strike Carragher's arm late on as he went up with fellow defender Daniel Agger to head clear.

BBC: Man City 0-0 Liverpool

He's no recluse, but he likes to spend time alone, roaming the mountains near his home in upstate Vermont, which helps keep his head clear.

NPR: Koushik Bends Genres To His Will

Utrecht skipper Silberbauer thought he had scored when he side-footed a corner at the Reds goal only for Meireles to head clear off the goal-line.

BBC: FC Utrecht 0-0 Liverpool