Examples
tāng汤mǔ姆zuò坐zài在le了shù gàn树干shàng上。
汤姆坐在了树干上。
Tom sat on a tree trunk.
啄木鸟正在使劲地啄树干。
The woodpecker is pecking the tree trunk vigorously.
为了不被洪水冲走，有的人紧紧地抱着树干长达数个钟头。
Some people clung to tree branches for several hours to avoid being washed away by the floodwaters.