就认出是他 meaning in English

i recognized him as soon as i saw his back

I recognized him as soon as i saw his back .
我一看到后身，就认出是他。
Alongside lay one of the gigs , silver in the stern - sheets - him i could always recognise - while a couple of men were leaning over the stern bulwarks , one of them with a red cap - the very rogue that i had seen some hours before stride - legs upon the palisade
大船旁停靠着一只划子，西尔弗坐在层座上，我一眼就认出是他，还有两个人斜靠在船墙上，其中一个戴着红色的帽子，正是我几个小时前看见的那个跨在栅栏上的坏蛋。