1.give birth to 生孩子
Compared to most mammals, human females give birth to a fetus, and it stays helpless a very long time.
与大多数哺乳动物相比,人类女性生育和保持胎儿处于无助的幼年期的时间更长
2.line up 排队
Please line up in order. Don't crowd.
请大家按顺序排队,不要拥挤
3.social media 社交媒体
Study found that children as young as 8 were using social media platforms largely for entertainment.
研究发现,8岁的儿童使用社交媒体平台大部分是为了娱乐
4.opt out of 决定不参加……
Employees may opt out of the company's pension plan.
雇员可选择不参加该公司的养老金计划