The first defense is our innate common sense.

第一道防线是我们固有的常识。

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The Alamo was the first defense against the Mexicans.

阿拉摩之役是抵抗墨西哥人的首次防卫战。

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The first defense against risk is to choose safe genes well and carefully and prove their suitability.

抵抗风险的第一道防线是精心选择一种安全基因，并证明其适用性。

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One week after Clay first proposed the compromise, he rose in the Senate to speak in its defense.

VOA: special.2009.03.19

Now, just to give you a sense of how cold and calculated this business was, and how in many ways the first defense or justification of slavery in America is of course it certainly is by the late Antebellum Period it is an unabashed economic defense, as we'll see.

以上只是为了让你们体会到,这种交易是如何的冷酷而精明,以及战前后期第一次,美国奴隶制度的保卫与正名之战,不管怎么看,都毫无疑问,是一场赤裸裸的利益保卫战,正如我们所见

耶鲁公开课 - 美国内战与重建课程节选

This is one of the primary strategies that Milton develops, especially in the first two books of Paradise Lost, as a kind of defense against his dependence on classical literature.

这是弥尔顿发展出的早期策略之一，尤其是在《失乐园》的前两册书中,这似乎是在反驳他对古典文学的依赖。

耶鲁公开课 - 弥尔顿课程节选

Ewing was called to the stand as the first defense witness in the McDougal contempt trial.

CNN: Deputy independent counsel says he wrote 'rough draft indictment' of Hillary Clinton

Mr. Hagel became the first defense secretary nominee in history required to garner 60 votes to win confirmation.

WSJ: Senate Clears Hagel Vote

The report's authors suggested governments were too quick to recommend anti-virals as the first defense against the spread of swine flu.

CNN: Study: Tamiflu may do children more harm than good