健康的树木也能更好地抵御树皮甲虫。
在北美西部的广大地区，日益温暖的冬季正导致树皮甲虫的大规模爆发。
Across vast areas of western North America, increasingly mild winters are causing massive outbreaks of bark beetle.
海滩松上的树皮甲虫会有选择性地寄居在松树上，避开年轻健康的松树。
Bark beetles in lodgepole pine used to be more selective, leaving the younger and healthier trees alone.
这些发现和近期其他的一些观察研究结果相似。其中包括一份对树皮甲虫的研究。
The findings are similar to those of other recent observations and studies, including one involving bark beetles.
在加拿大和澳大利亚全球变暖的危害或许已经显现：一连几个暖冬造成了加拿大树皮甲虫成灾，旱灾和大火也使澳大利亚的森林屡遭破坏。
That may already be happening in Canada, where recent warm winters have unleashed a plague of bark beetles, and in Australia, whose forests have been devastated by drought and forest fires.
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。
He could see the beetle under the bark, and draw it forth unharmed for us to squint at through the magnifying glass.
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。
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。
The beetle attacks mature trees only; its larvae ultimately kill the tree by feeding under its bark.
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