quadruplets
n. 四胎儿；四胞胎之一；成套的四件
例句
They are happy quadruplets.
他们是快乐的四胞胎。
Then she got pregnant with the quadruplets.
可她又怀上了四胞胎。
If you make more then quadruplets the newborns will not grow properly and probably die.
如果多于四胞胎，新生儿将不能正常成长或可能死亡。
