机体需要微量的硒以维持正常代谢。

The body needs small amounts of it for healthy metabolism.

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这只是一个正常代谢的后果。

It's just a consequence of normal metabolism.

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但最近，医生根据异常的血肌酐(一种正常代谢副产物)水平进行诊断。

But more recently, physicians began shifting their definition to one based on abnormal blood levels of creatinine, a normal byproduct of metabolism.

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Diabetics whose pancreas does not function properly, so don't make enough insulin, don't have enough insulin present for normal glucose metabolism so they can't handle sugars properly.

糖尿病人的胰脏功能失调,因此胰岛素分泌不足,影响了正常的血糖代谢,所以他们不能正常地调节血糖

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