This helped narrow down the cause of Lyme disease to the ticks.

这有助于将莱姆病的病因缩小到蜱虫身上。

In other words, if mice can't carry Lyme disease then they can't pass it on to the ticks who bite them.

换句话说，如果老鼠不携带莱姆病菌，那么它就不可能传播到壁虱身上。

Knight said nothing to this for a minute or more, and kept silent time with his finger to the tick of the old library clock, in which room the colloquy was going on.

有一分钟或更长时间，奈特对此一言不发，并用手指按着旧图书馆时钟的滴答声保持沉默，谈话正在进行的房间。