accretion borer

• 生长锥

accretion borer的用法和样例：

例句

1. If the borer has been properly located and drilled into the pith, a record of growth and age is obtainable for that position on the tree.
   如果生长锥放的位置适当，钻入木髓即可得到树木那个部位的生长记录和年龄。