所查阅的材料在写报告前需要经过导师许可。

The source materials need to be approved by the instructor before the paper is written.

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普罗金已故导师雅各布·伊沙(Jacob Ishay)经过观察，发现太阳光最强烈时，这种昆虫很活跃——这对黄蜂来说比较罕见的现象。

Plotkin's late mentor Jacob Ishay made the discovery after observing that the insect is active when the sun is most intense—unusual for hornets.

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经过这些年，他已经成为了一个导师、朋友。

Over the years, he has become a mentor and a friend.

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