christmas tree gage

例句：

1. 1.We need to measure the height of the Christmas tree before we hang it up.
   我们需要在挂圣诞树之前先测量它的高度。
2. 2.The Christmas tree gage is a useful tool for measuring the size of the tree.
   圣诞树测量器是一个测量圣诞树大小有用的工具。
3. 3. The family used the Christmas tree gage to ensure that the tree was tall enough for everyone to see.
   家人使用圣诞树测量器确保圣诞树足够高，让每个人都能看到。