dentation

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

这一在形状，尺寸和叶片边缘牙里易变广布种。

2.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.

后第一个下降沿检测凸轮信号为低，则接下TDC一缸TDC。