dentation

This is a widespread species variable in the shape, size, and marginal dentation of the leaf blades.

这是一在形状，尺寸和边缘牙齿里易变广布种。

In case that the camshaft signal measured by the first falling edge after dentation is low, then the following TDC would be of the first cylinder.

若缺齿后第一个下降沿检测凸轮信号为低，则接下来TDC是一缸TDC。