stem girth

例句：

1. 1. The tree's stem girth is measured in inches.
   这棵树的茎干直径以英寸为单位测量。
2. 2.The car's trunk girth was too small for the luggage.
   这辆车的后备箱容积太小，装不下行李。
3. 3.The engineer checked the stem girth of the ship to ensure it would hold its load.
   工程师检查了船只的茎干直径，以确保它能承载其负载。