one more SC

qiufeng1990

More than five thousand years ago, Chinese scholars accurately described the flow of blood as a continuous circle controlled by the heart,( but the discovery went unnoticed in the West).

b) although the discoversy was unnoticed in the West.

princess

b
表让步，而非转折

qiufeng1990

key: a
斑竹：　能否解释得更清楚些？？？？

tongxun

刚看到此帖，不好意思。
用but 表对比、转折。让步状语没有此效果。

princess

hehe,不好意思做错了，记性不好了
go unnoticed强调一种持续的状态，而was unnotice只表示过去的一个时间点

qiufeng1990

有道理。需体会意思。是转折。