octane number
柯林斯词典
1. N a measure of the quality of a petrol expressed as the percentage of isooctane in a mixture of isooctane and n-heptane that gives a fuel with the same antiknock qualities as the given petrol 辛烷值
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octane number (also octane rating)
剑桥词典
- a number showing the quality of petrol by representing how well and with how much power it can make an engine work
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