We will use air power to protect UN peacekeepers if necessary.

必要时我们会动用空军力量来保护联合国维和部队的安全。

《柯林斯英汉双解大词典》

The polluted air becomes poisonous to health, so it is the high time that we took actions to protect the environment.

被污染的空气有害健康，所以我们是时候采取行动保护环境了。

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To protect the stamps, some people also put the stamps into a special room which has a machine to keep the air cool and dry.

为了保护邮票，一些人也把邮票放在有机器保持空气凉爽和干燥的特殊房间里。

youdao

Just a few weeks ago, thanks to the hard work of so many of you, Lisa and I was able to announce new common-sense standards to better protect the air we breathe from mercury and other harmful air pollution.

WHITEHOUSE: President Obama Speaks to Environmental Protection Agency Staff | The White House

But there are other measures that the government can and should take, including ensuring that the regulations we pursue appropriately protect Americans -- their food and water and air -- but do not unnecessarily impinge on businesses, and things like the payroll tax cut that the President talked about today.

WHITEHOUSE: Press Briefing

He added that gun-carrying pilots, federal air marshals and airline crew members trained in self-defense provided security to protect against the misuse of the newly added items.

WSJ: NY Senator opposes plan to allow knives on planes