下目（infra-order)，又译作次目，是生物分类法的一级，一般介于亚目和科之间，但下目之下有时也分超科，下目的拉丁文分类名称在非动物类时大多为-aria的字尾，但动物则无固定字尾。
In addition, life habits and life cycle of Infraorder Mygalomorphae were briefly described on the basis of reference materials, author's collection and observation of several mygalomorph spiders in during of short - term feeding.
此外，作者依据文献及采集和短时饲养时的观察，简要描述了原蛛下目蜘蛛的生活习性及生活史。
参考来源 - 中国六疣蛛科和线蛛科的分类研究及应用RAPD技术于蜘蛛亲缘关系的初步探讨·2,447,543篇论文数据，部分数据来源于NoteExpress
尽管我只能接受这段代码，但它是如此地晦涩，这您只需要看一下清单13就会一目了然。
That code was so ugly even I had to admit it, as you can see for yourself by looking at Listing 13.
爱珍多龙化石属于主龙形下纲，主龙形下纲包括鸟类及鳄目爬行动物，但非蜥蜴、蛇或者是龟类。
The fossil he mentions is now a member of Archosauromorpha, a group that includes birds and crocodilians, but not lizards, snakes, or turtles.
在三个研究中心带领下的实验中，开始喂药的相对年老的老鼠大体上比啮齿目动物活得长。
In tests conducted at three research centres, mice that began taking the drug at a relatively old age lived substantially longer than other rodents.
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