or thereabouts用在数量词后面表示概数
thereabouts detail大约那时
or somewhere thereabouts上下的样子
PHRASE（习语） You add or thereabouts after a number or date to indicate that it is approximate. 大约; 左右 [n/num PHR]
He told us that her age was forty-eight or thereabouts.
他告诉我们她的年龄在四十八岁左右。