我的意思是，这令我们非常惊讶，因为先前负号无处可寻，现在却突然出现了。

I mean, it's pretty surprising to see that minus sign come out of nowhere the first time you see it.

youdao

我的意思是，这令我们非常惊讶，因为先前负号无处可寻，现在却突然出现了。

I mean, it's pretty surprising to see that minus sign come out of nowhere the first time you see it.

youdao