cut off root tips 切下根尖
Damping off and root rot 猝倒病与根腐病
one-off root canal 一次性根管
one-off root canal therapy 根管治疗术一次法
one-off root canal treatment 一次性根管治疗术
root-raised cosine roll-off digital filter 平方根升余弦滤波器
cutting off crown and root 截冠去根
square-root raised cosine roll-off filter 平方根升余弦滚降滤波器
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