notches
n.
（边缘或表面上的）V型痕迹( notch的名词复数 );
刻痕;
水平;
等级;
例句:
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He's a few notches up the evolutionary ladder.
来自THETIMES
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The Indians cut notches on a stick to keep count of numbers.
印第安人在棒上刻V形 凹痕用来计数.
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On the third day, General Zhang raised the temperature of the assembly a few notches.
第三天，张将军使大会的热烈程度提高了几档。
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They cut notches in the handle of their pistol for each man they shot.
他们每杀一个人就在枪托上刻下一个V形记号。
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Its current rating is two notches above that.
来自WSJ
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Some performers are several notches better than others.
来自WSJ