动词saw的过去分词
He has already sawn the branches up; now we have plenty of firewood. 他已经把树枝锯成一段一段的，现在我们有足够的木柴了。
All the trees have been sawn up into logs. 所有的树都已锯成原木。
vt.四开圆木(纵向锯成四块)
