It is hypothesized that the introduction of an electron-withdrawing group, such as a double bond, into the β-lactam ring might reduce stability and expand the ability of compounds to inhibit both class A and class C enzymes. 请求各位大神帮忙把这句话改简单一些，审稿人说这个句子含有三个动词，不便于读者理解。谢谢啦
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