现在必须得停一下了，之前说到的，可以通过把坐标系变换到某平面上，那些曲面都是平的。

Now, this has to stop somewhere. I can start claiming that I can somehow bend my coordinates to a plane, any surface is flat.

youdao

他摸索自己的四肢，发现几颗纽扣不见了，衣服翻到了脑后，之前放在口袋里的刀不见了，之前系在下巴下的帽子也不见了。

His knife had gone from his pocket and his hat was lost, though he had tied it under his chin.

youdao