Having two babies at a time is associated with a longer life, according to a new study. But that's not because doubling up on dirty diapers increases life span; instead, moms of twins are physically stronger in the first place. 一项最新的研究发现,育有双胞胎的母亲寿命较长。当然这倒不是说每天多洗一堆尿布能使人长寿,而是能生双胞胎的妇女首先身体就不会差。 |