We enter it not on our own strength but by piggyback.
我们得以进入，不是凭自己的力量，乃是被背进去的。
The two parasites also piggyback from host to host on different species of Anopheles.
这两种寄生虫还通过不同的按蚊由一个宿主传播到另一个宿主。
The two parasites also piggyback from host to host on different species of Anopheles.
这两种寄生虫还通过不同的按蚊由一个宿主传播到另一个宿主。
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