这两个形容词均含“宽阔的”之意。
broad : 普通用词，指向两边延伸的宽度，强调两边之间面积的广阔，也可指向四方伸展开去。
- We walked down a broad avenue lined with trees.
我们走在林荫大道上。 - He flashed a broad grin at us.
他冲我们咧嘴笑了笑。 - My brother is very broad-shouldered.
我兄弟肩膀很宽。
wide : 常用词，侧重指两边或两点之间的距离。着重距离的远近。
- a wide river/road/gap/foot
宽阔的河流／道路／巨大的裂口／大脚 - His eyes were wide (= opened much more than usual) with surprise.
他惊讶得睁大了眼睛。
