The truth is rarely pure and never simple.
真相很少纯粹，也绝不简单。
"The immune system is the key to fighting cancer."
茍活比牺牲需要更多的勇气。
I've learned that pressure is a privilege.
No man, for any considerable period, can wear one face to himself and another to the multitude, without finally getting bewildered as to which may be the true.
"In the end, the only thing that matters is the truth."
化学的进步以新元素的发现及其性质的测定为标志。