“树干”的拼音为：shù gàn...

在树干上切一道大约半英寸长的口子。Make a slit in the stem about half an inch long.沿水平方向整齐地锯断树干。Cut horizontally and cleanly through the stem.树干的直径the diameter of a tree trunk...

“树干”的英语可以翻译为：tree trunk，trunk，bole，stock ...