These contraptions, including a nano-sized car, are so small that they're invisible to the human eye.

这些包括纳米汽车在内的轻巧设计小得甚至连肉眼都不可见。

youdao

These contraptions, including a nano-sized car, are so small that they're invisible to the human eye.

这些包括纳米汽车在内的轻巧设计小得甚至连肉眼都不可见。

youdao