现在设想你的笔记本电脑比一个牛皮纸信封或者你手中的手机还薄。

Now think of your laptop, thinner than a brown-paper envelope, or your cellphone in the palm of your hand.

youdao

现在设想你的笔记本电脑比一个牛皮纸信封或者你手中的手机还薄。

Now think of your laptop, thinner than a brown-paper envelope, or your cellphone in the palm of your hand.

youdao