自由基(极具化学反应性的含氧分子)的聚集，至少在某种程度上，使恶性肿瘤的生长如同加了燃料一般。
The growth of cancerous tumors is fueled, at least in part, by the buildup of free radicals-highly reactive oxygen-containing molecules.
结果表明，由于成核添加剂与PET之间在熔融态下存在化学反应，导致PET有不同程度的分子量下降，同时PET结晶速率发生变化。
It is found that there are chemical reactions between nucleating additives and PET in the melt state, resulting in the change of molecular weight and crystallization rate of PET in some degree.
什么是爱情从某种程度上说，爱情是一种生物化学反应，但这种反应不可能延续长久。
What is love on one level it is a biochemical reaction, and that cannot endure.
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