单词：accretion borer
accretion borer的用法和样例：
例句
- 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。
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火山爆发 The Eruption of Volcano abundant adj. 丰富的，富余的 accretion n. 增长 accumulation n. 积聚，堆积物 active volcano 活火山 Alaska Volcano Observatory 阿拉斯加州火山观
英文语法词汇
bed, deposit, field 书馆 矿床 outcrop 露头 fault 断层 vein, sean, lode 矿脉 gold reef 金矿矿脉 pocket 矿穴 reservoir 储藏 water table 潜水面，地下水面 mine 矿 stratum, layer 矿
英文语法词汇