a low-grade infection

轻度感染

牛津词典

So when you eat out, you're either spending more cash or eating low - grade product.

所以,当你到外面吃饭的时候, 你不是花费了更多的金钱,就是食用了劣等的东西.

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The low grade mineral resources are widely distributed in the western China.

我国西部地区广泛分布着低品位金矿资源.

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He is a bit let down by the low grade he got.

这次成绩不好,他有点气馁.

《简明英汉词典》

This paper analyzes the utilization problem of low grade ore with many uses.

微生物种类及其作用机理是浸出低品位矿石的关键所在.

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Leonard got a low grade in one subject, but all in all he's a good student.

李奥纳多有一科成绩很差, 不过整体而言还算是个好学生.

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