size的意思

题目

size的意思
in size
The Dog And The Shadow 狗和它的影子
A DOG,crossing a bridge over a stream with a piece of flesh in his mouth,saw his own shadow in the water,and took it for that of another Dog,with a piece of meat double his own in size.He therefore let go his own,and fiercely attacked the other Dog,to get his larger piece from him.He thus lost both:that which he grasped at in the water,because it was a shadow; and his own,because the stream swept it away.
一条狗嘴里叼块肉,来到一座桥上.它看见水里有自己的影子,以为是另一条嘴里也叼着一块比自己那块肉大一倍的狗.它忙丢下自己嘴里的那块肉,猛力地攻击水里的狗.试图去抢它的肉.结果,它两块肉都得不到.因为那只是一个影子,它自己的影子而已.真正的肉也被水冲走了
这片短文中 with a piece of meat double his own in
里面的in size 还有double his
感激不尽……

答案

in size:在尺寸上
double his own:是他自己的（肉）的2倍大小