不够丑陋。
"In computer science, we are always trying to find the balance between expressiveness and tractability."
Change is not made without inconvenience, even from worse to better.
解读：这是诙谐调侃，意在缓解人们自我否定时的低落情绪，用幽默方式鼓励换个视角看自己，重拾轻松心态。
海洋保护不是对业务的限制，而是持久业务的基础。
社会系统是个人之间以及群体之间关系的系统。