I see you wrote " N-o-period" instead of the number sign.

我看到你在桌卡上写的是NO. 没写数字符号。

One more thing to watch out for. Parenthesis act as a forcefield so we don't confuse the number sign with the operation. Much better.

还有一件事需要注意。括号充当力场，因此我们不会将数字符号与运算混淆。好多了。