图中表示了这两种类间的关系。
The relation between the two classes is also represented in this diagram.
他们中的大多数人都对病毒在动物种类间的传播没有概念。
Most people were also unaware that the virus could transmit across different species.
1月在美国杂志《科学》上发表的一项研究发现，在过去8至15年间，几乎所有有记录的鲨鱼种类的数量都减少了一半。
A study, published in January in the US magazine, Science, found that almost all recorded shark species have fallen by half in the past 8 to 15 years.
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