It is a tight, buff, lean, and mean fighting machine.

它是一架结实、强壮、精瘦、凶狠的战斗机器。

youdao

Give feedback, ask for feedback, and mean it.

真心实意，给予反馈，要求反馈。

youdao

When you have to say “NO!” say it and mean it.

当你不得不说“不！” 时，那就认真地说吧。

youdao

New profits and freedom from the pay limits tied to federal aid mean bankers can again receive big bonuses.

VOA: special.2009.12.18

Whenever Johnson is being arrogant and mean about Paradise Lost, invariably he's on to something, and here he's telling us that Milton's gone too far. He's taken his allegory too far.

约翰逊任何时候都对《失乐园》报以傲慢且刻薄的态度，不可避免地，他是想表达着什么，在这里他想告诉我们,弥尔顿做得太过了，他在寓言上走得过远。

耶鲁公开课 - 弥尔顿课程节选

Or you could say "I wonder if" and mean that you really do wonder,

或者你可以用“I wonder if”来表达你的确不是很清楚。

I wonder if 课堂 - SpeakingMax英语口语达人

Lay down a firm rule that statutes say what they mean and mean what they say.

FORBES: Why Justice Breyer Should Steer Clear of Political Science

We tell inconsequential lies, substantive lies, little lies, big lies, social lies and mean lies.

FORBES: Have You Been Lied To at Work?

They know the government has got to be lean and mean and do smart things.

WHITEHOUSE: President Obama Speaks on Skills for American Workers