Helicopters can land no matter where a hard level ground exists.

直升飞机可降落在任何平整的硬地面。

youdao

He waited until they were level with the door before he pivoted around sharply and punched Graham hard.

他等他们接近门口时才一个急转身用拳头猛揍格雷厄姆。

《柯林斯英汉双解大词典》

Gathering your resources to "try hard" requires burning energy in order to overcome your currently low arousal level.

调动资源来“努力尝试”，需要消耗精力，以克服目前的低唤醒水平。

youdao

I think that's gut-level, hard-wired, evolved to solve prisoner's dilemmas.

这种感觉是根深蒂固的，经过进化而来的，帮我们解决囚徒困境的。

耶鲁公开课 - 心理学导论课程节选

Hence, selfish genes will lead to altruistic animals because, to the extent that evolution operates at the level of the genes, there's no hard and fast distinction between your own body and someone else's body.

所以，自私基因会导致利他行为，从这个意义上说,进化在基因层面进行，你自己的身体和别人的身体,没有严格差别。

耶鲁公开课 - 心理学导论课程节选

Mr Stanakzai says the Taliban is finding it increasingly hard to justify the level of violence being used in Afghanistan.

BBC: Afghanistan eyes Taliban peace ahead of Nato withdrawal

One of the reasons it's so hard to assess the level of vegetarianism is because of the multiple definitions of the term.

BBC: The rise of the non-veggie vegetarian

Applicants had to be proven seamen, hard-working and level-headed, with a spotless criminal record (Houston uses private investigators to check up on that).

ECONOMIST: The other Texas