很长的时间以内这些寄生物都能经常在寄主的衣服上被发现，使得研究人员能够基于寄生物的演变来研究寄主的进化演进。
These parasites are often found stranded on lineages of hosts over long periods of time, permitting researchers to learn about evolutionary changes in the host based on changes in the parasite.
很长的时间以内这些寄生物都能经常在寄主的衣服上被发现，使得研究人员能够基于寄生物的演变来研究寄主的进化演进。
These parasites are often found stranded on lineages of hosts over long periods of time, permitting researchers to learn about evolutionary changes in the host based on changes in the parasite.
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