您好,and 后面的这个逗号是需要,因为这个逗号不是跟着 and 而是跟着后面的 with the bag in their possession。也就是后面是一个短语(with the bag in their possession),前后都用了逗号作为区别。之所以这么做是因为这一句很长,主干其实是一个并列句: the strap broke and both men started running through the trees 然后插入两个短语,第一个是 in the struggle 后接一个逗号,另一个是 with the bag in their possession 前后都接了一个逗号,作为区别使用的。