According to Jennifer Debruyn, the next step of the study is to find out the source of the enzyme.

2018年高考英语北京卷 阅读理解 阅读C 题设

Jennifer Debruyn, a microbiologist at the university of tennessee, who was not involved in the study, says it is not surprising that such worms can break down polyethylene.

2018年高考英语北京卷 阅读理解 阅读C 原文

The next step, debruyn says, will be to identify the cause of the breakdown.

2018年高考英语北京卷 阅读理解 阅读C 原文