The ethical issues surrounding IVF are complex, but the desire to have a child is a fundamental human right.
大国攻打小国,就好像儿童爬在地上当马一样。
韧性不仅仅是恢复;它是从挑战中学习和成长。
最卑微的个体也会对他人产生一定的影响,无论是好是坏。
A problem is in P if it can be solved quickly by a computer, and in NP if a solution can be verified quickly.