branch subroutine

例句：

1. 1. The tree has many branches reachingout to the sky.
   这棵树有很多枝条伸向天空。
2. 2. The branch of science isvery broad.
   科学的分支非常广泛。
3. 3. The branchof the forest is lush and green.
   森林的分支郁郁葱葱，绿意盎然。