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原级：ferule
现在分词：feruling
过去分词：feruled
过去式：feruled
ferules
1. Ferules, made of ebony, wood or bone, were straight tools used for tapping—or what today we call tapotement. Ferules，乌木，木材或骨头，被用来直接用于开采工具或什么，我们今天呼吁tapotement。