表示对照：(contrast)

　　on the contrary;

　　on the other hand;

　　otherwise;

　　unlike;

　　in contrast;

　　whereas;

　　rather than;

　　conversely;

　　instead;

　　by contrast.

　　表示让步：(concession)

　　although;

　　nevertheless;

　　however;

　　but;

　　yet;

　　admittedly;

　　it is true...but;

　　in spite of;

　　even though;

　　granted that.