There are 51 species of the Gasteromycetes, in Shaanxi Province, including 2 doubtful species and 13 new records of Shaanxi Province, belonging to 19 Genus, 9 Families and 6 Orders.
本文报道了产于陕西省的腹菌纲真菌51种，其中包括2个疑难种和13个省内新记录种，隶属于6目、9科19属。
Given these pressures, and additional ones affecting other animals, it's doubtful that most mammal species will experience much of an overall growth spurt anytime soon.
在这些压力以及以及其它一些因素的作用下，大多数哺乳动物很难在短时间内出现体型上的巨大变化。
Taxus l. is a problematic genus, not only its species are discouragingly similar, but also its family circumscription are still doubtful.
红豆杉种属的问题，不但它的种类惊人地相似，而且其科的界限也非常模糊。
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