The two creatures were found about six miles apart, which he believes may be the full extent of the area colonised by the extremely rare species.
这两只变色龙发现的地点相隔6英里。 马歇尔相信，这一稀有物种的栖息地差不多也就这么大。
Scientists know a lot about the two lab-friendly species Physarum and Dictyostelium, but they still know very little about the many other slime molds on earth.
科学家对于实验室经常使用的两种黏菌—绒泡菌和盘基网柄菌—已经十分了解，对于地球上的其他黏菌却知之甚少。
The debate over whether the African elephant is one or two species has been going on for about a decade.
关于非洲象是一个还是两个物种的争论已经持续了差不多十年。
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