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1·First, it increases the production of free radicals, highly reactive molecules that tear about sensitive cell components like DNA, causing premature cell death (apoptosis).

首先，造成自由基生成的增加，激活一些分子造成细胞中敏感物质如dna等的损伤，因而造成了细胞过早的凋亡。

2·A real fighter never complains or whimpers when another dog is about to tear it to ribbons.

当另一只狗要把它撕成碎片时，真正的战士从不抱怨和呜咽。

3·DBUnit is about maintaining database integrity across test runs (and in fact you can use DBUnit as part of the set up and tear down of your tests in Twist).

DBUnit是关于跨测试执行(test runs)去维护数据库完整性(事实上，在Twist测试中，你可以使用DBUnit作为测试初始化和运行结束的一部分)。

4·He spoke about the conflict over whether to protect the old walls or tear them down to represent the conflict of ideas.

他通过谈论保护与拆毁古城墙之间的矛盾，显示了这两种观念之间的冲突。

5·Over the years, on too many occasions to count, I saw my father tear stories out of the newspaper, about people he had never met who were facing some injustice or hardship.

多年来，在太多次场合，我看到父亲撕掉报纸上关于一些他从未谋面人的故事，他们正面遭受不公或面临困境。

6·Over the years, on too many occasions to count, I saw my father tear stories out of the newspaper about people whom he had never met, who were facing some injustice or hardship.

多年来，在太多次场合，我看到父亲撕掉报纸上关于一些他从未谋面人的故事，他们正面遭受不公或面临困境。

7·“I remember once he was particularly quiet, ” said Mr. Obama’s senior adviser, David Axelrod, “and I asked him what he was thinking about, and he said, ‘These letters just tear you up.’

奥巴马先生的高级顾问大卫·阿克塞尔罗德说，“我记得有一次他特别静默，”顾问说，“我问他在想什么，他说，‘这些来信读了就让人心碎。’

8·Bill: So, how about it? Can you tear yourself away from the TV tonight?

比尔：那么，这主意如何？你能今晚远离电视机吗？

9·Over the years, on too many occasions to count, I saw my father tear stories out of the newspaper about people whom he had never met, who were facing some injustice or hardship.

多年来，在多到数不清的场合里，我看到我父亲从报纸上撕下关于那些他从未见过的正在面临不公和苦难的人的报道。

10·He had been puzzling all day for the answer to the last clue in the crossword and was about to tear his hair out when his wife told him the correct answer.

他整整一天都在为能解答纵横填字的最后一个迷而苦思，就在他几乎已是集躁不安的时候，他妻子告诉他正确的答案。