In the chemical industry, safety isn't a department - it's a culture.
有时我们会为某些事情感到悲伤,而我们不愿意告诉别人我们为此感到悲伤。
There is no such thing as an empty space or an empty time. There is always something to see, something to hear.
如果人们不相信数学是简单的,那只是因为他们没有意识到生活有多么复杂。