should 的作用 ?

bryan0806

Low levels of straying are crucial, since the process provides a source of novel genes and a mechanism by which a location can be repopulated should the fish there disappear.

不好意思   问一下 这句(gwd 1)要怎么翻译   

should 的 作用 在这句是舍么?   谢谢 !!

rhod

Please refer to the discussion of OG 151 and Da quan Section 03 No. 04.

http://forum.chasedream.com/dispbbs.asp?boardID=23&ID=17544

http://forum.chasedream.com/dispbbs.asp?boardID=23&ID=15346

bryan0806

thanks !!