The U.S. is also the only advanced economy that does not guarantee workers paid vacation time, and it's one of only two countries in the world that does not offer guaranteed paid maternity leave. 提供有保障的带薪产假
She seems to have a strong maternal instinct. 她似乎有很强的母性。
I'm not very maternal. 我不太像个母亲。
Maternal age affects the baby's survival rate. 母亲的年龄影响婴儿的成活率。