同根派生 英汉例句Round head low square neck carriage bolts.半圆头低方颈螺栓。He said he would head the antenna with a ball.他说他还要给天线安个圆头。Our tools are round brushes varying from very fine to very coarse, and paints.我们的工具是从很细到很粗的圆头画笔，然后就开始画。