These are a normal by-product of mitochondrial activity, but are usually mopped up by special enzymes before they can escape and cause harm—for instance, by damaging a cell's DNA.
这类物质一般是线粒体活动的副产品，但是通常都在泄露并造成伤害前被特殊的酶消灭——比如，它们可能损害细胞的DNA。
They were soon gone again, rising from their seats with an activity which took their brother by surprise, and hurrying off as if eager to escape from Mrs. Bennet's civilities.
她们一会儿告辞了，而且那两个娘儿们出于她们的兄弟彬格莱先生的意料之外，一骨碌从座位上站了起来，拔腿就走，好象急于要避开班纳特太太那些纠缠不清的繁文缛节似的。
AIM: To screen and identify the short-peptide which specifically bind to human CD59 so as to design short-peptide clamp with counteracting tumor escape activity.
目的：筛选并鉴定与人CD59分子特异结合的短肽，为设计具有拮抗CD59肿瘤逃逸活性的短肽封条奠定基础。
But Banks can't escape the reality that the big public deals are both their shop window and a key barometer for overall activity.
不过银行无法否认这样一个事实，即大规模公开市场交易既是他们的“门面”，也是反映整体活动的重要晴雨表。
But Banks can't escape the reality that the big public deals are both their shop window and a key barometer for overall activity.
不过银行无法否认这样一个事实，即大规模公开市场交易既是他们的“门面”，也是反映整体活动的重要晴雨表。
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