On the left, the purple, cyanand green hues signify low, medium, and high altitudes, respectively.

左图中的紫色、蓝绿色和绿色分别表示低、中和高海拔。

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The CAA said ash levels would now be graded as low, medium or high, and airlines would be notified if levels reached medium or high.

CAA说，火山灰的等级分为低、中、高档，如果达到中档或高档，将通知航空公司。

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We have four levels of heating and four levels of cooling that include low, medium, high and very high.

我们有四级冷调及热调系统：低、中、高及超高。

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Up to that point, phones came in three basic categories: low, medium and high.

FORBES: Magazine Article

The researchers classified the embryos as low, medium or high risk of chromosome abnormalities based on their development at certain key points.

BBC: IVF 'may be boosted by time-lapse embryo imaging'

For example, shows can be watched in one of four video-quality levels (low, medium, high or auto), but people might not know what their network is capable of playing.

WSJ: For Live TV on the Go, Aereo Is Impressive But Limited