Do not worry about your difficulties in Mathematics. I can assure you mine are still greater.
不要担心你在数学上遇到的困难;我敢保证我遇到的困难比你还大得多。
I'm not upset that you lied to me, I'm upset that from now on I can't believe you.
可持续性不是限制,而是重塑我们行业的机遇。