The beetle attacks mature trees only; its larvae ultimately kill the tree by feeding under its bark.
山松甲虫只寄生于成年树木，它的幼虫会通过取食树皮下的组织最终杀死树木。
He could see the beetle under the bark, and draw it forth unharmed for us to squint at through the magnifying glass.
他能看到树皮下的甲虫，并把它毫发无伤地捉下来，放在放大镜下让我们看。
The most significant threat to bats is habitat clearance, particularly the removal of the old forest wood where they roost in hollows or under the bark of trees.
对蝙蝠最严重的威胁来自对其栖息地的彻底破坏，特别是对老林区的砍伐，威胁最大。老林区的树洞或树皮内，是蝙蝠赖以栖息的地方。
Some negroes advanced in a bark under the balloon.
在气球下面有几个黑人划著一只小船。
He has a great bundle of white oak bark under his arm for a sick man, gathered this Sunday morning.
他手臂下挟了一大捆白橡树皮，是这星期日的早晨，他收集来给一个生病人的。
He hunted, too, for deep-boring grubs under the bark of the trees, and robbed the wasps of their new broods.
他也捕猎，在树干下挖掘藏在很深地里的蛴螬，从马蜂窝里抢出幼卵。
Solitary or in pairs; roosts in tunnels, old mine shafts, hollow trees and under thick tree bark.
独居或成对，栖息于隧道、废弃矿井、树洞内，以及厚树皮底下。
Check out worm tracks in the mud or just under the bark on firewood.
在泥土中或柴火的树皮上检查虫子的踪迹。
Check out worm tracks in the mud or just under the bark on firewood.
在泥土中或柴火的树皮上检查虫子的踪迹。
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