两个头部交替迈步沿微管前进，最快每秒100步(800纳米)。
The heads take turns stepping along the microtubule, at a rate of up to 100 steps (800 nanometers) per second.
在湍急的河流中，要让船只以最快的速度前进，你必须不断刮除积附在船底的障碍物。
To keep your ship moving through the water at maximum efficiency, you have to keep scraping the barnacles off its bottom.
在湍急的河流中，要让船只以最快的速度前进，你必须不断刮除积附在船底的障碍物。
To keep your ship moving through the water at maximum efficiency, you have to keep scraping the barnacles off its bottom.
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