免疫系统就像一把双刃剑；它可以对抗癌症，但也需要被控制。
"The immune system is like a double-edged sword; it can fight cancer but also needs to be controlled."
"The challenge in theoretical computer science is not just to solve problems, but to understand why they are hard to solve."
"The key to success is to focus on goals, not obstacles."
成功的秘诀是学会如何利用痛苦和快乐，而不是让痛苦和快乐利用你。如果你这样做，你就控制了你的生活。如果你不这样做，生活就控制了你。
