human survival的用法和樣例：
例句
- On a long enough timeline, the survival rate for everyone drops to zero.
在一個(gè)夠長(cháng)的時(shí)間線(xiàn)上，每一個(gè)人的存活率掉到零。 - Evolution produced this reward system because it increased the survival of members of our social primate species.
演化產(chǎn)生了這個(gè)報償系統，因它增加了社會(huì )成員的存活率。
