文章中: 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. 哪位说说最后这几个词的语法是怎样的好么?不懂:(。。。谢谢:)
题目中也是一样的结构,猜得出意思,不知道语法关系:(
an environmentally degraded stream could be recolonized by new salmon populations should the stream recover
我其实也想知道为什么的,hehe,
populations ( if )the stream should recover
虚拟语气:如果那里的鱼消失
A: 如果那里的河流恢复
有时if引导的状语从句可以省略 if,而把从句中的动词 were, had 或 should 移到主语前面
欢迎光临 国际顶尖MBA申请交流平台--TOPWAY MBA (http://forum.topway.org/) | Powered by Discuz! 7.2 |