And seat belt use, the most basic defense in a crash, reached an all-time high of 84 percent in 2009.

安全带的使用在2009年也达到了最高的84%的比例，这是汽车撞车最基本的保护。

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As he said, physical wellbeing isn't "merely your health insurance, but [your] basic defense against stress."

就像他说的，体育锻炼“不仅仅是健康的保障，也是最基本的排解压力的方式。”

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Attack and defense are two basic sides of rivalry.

攻击和防御是对抗的两个基本方面。

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But much of what Obama considers "squishy" is seen by senators like Grassley as a principled defense of basic freedoms.

CNN: Gun control debate intensifies as Grassley crafts new bill

The basic idea is that when defense is up, as it was after 9-11, commercial will often be down, and vice versa.

FORBES: Boeing's Defense Turnaround

The basic question was whether the defense could put the war on trial, and the judge said look, that's a political question.

NPR: What Does Watada Case Mean for Military Law?