善恶之间的界限是可渗透的，任何人在环境的推动下都可能跨越它。
"The line between good and evil is permeable and anyone can cross it when pushed by circumstances."
The key to a great performance is listening. It's not just about delivering your lines, but really hearing what the other actors are saying and responding truthfully.
轧棉机的发明是一系列无法预见的 circumstances 的结果。