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。

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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)。

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