It is noticed that oleanane triterpenoidal saponins are characteristic constituents of this family and have taxonomic significance.
结果表明齐墩果烷型三萜皂甙作为木通科化学成分在该科
统分类中具有一定
。
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The taxonomist sometimes overlooks whole species in favour of those groups currently under study, while the ecologist often cotlects only a limited number of specimens of each species, thus reducing their value for taxonomic investigations.
分类家们有时会忽略整个物种而选择当时正在研究的那些物种群,而生态
家常常只收集每个物种有限的几个样本,因此就降低了分类研究的价值。
But I do think that for many animals, especially animals that are close to us on the taxonomic tree of life, like chimpanzees and other large mammals, that being able to make your own choices is part of that flourishing.
但我认为,对于许多动物来说,特别是在生命分类树上和我们很接切的动物,比如黑猩猩及其他大型哺乳类动物,那种茁壮成长的其中一部分就是能够自己做选择。
One theory holds that, if Rhyniognatha was a flying insect, that would mean that the pterygotes -- the taxonomic group that includes flying insects -- first came about in the early Devonian, say, more than 400 million years ago.
一种理认为, 如果鼻颚龙是一种飞行昆虫,那就意味着翼龙——包括飞行昆虫在内的分类群——首先出现于泥盆纪早期,比方说,4 亿多年前。