例句 /

American teen childbearing rate is higher than its European counterpart because there are more teenagers in America involving in active sexual activities is bigger.

American teen childbearing rate is higher than its European counterpart because there are more teenagers in America involving in active sexual activities is bigger.

因为相比之下在美国有更多的未成年人有主动的性行为,那里的未成年人怀孕的比率高于欧洲的同龄人.