late childbirth造句怎么写

No marriage may be contracted before the man has reached 22 years of age and the woman 20 years of age. Late marriage and late childbirth shall be encouraged.

Among these women, the researchers found, late childbirth indeed conferred longer life.

Late marriage and late childbirth shall be encouraged.

Smith and his colleagues are now going to investigate whether late childbirth and longevity are related to life-shortening illnesses like heart disease and cancer.