n.發(fā)渾(指清漆)；發(fā)暗；消光

動(dòng)詞dull的現(xiàn)在分詞形式.

The party was a dull affair. 這次聚會(huì)單調(diào)乏味。

This student is very dull. 這個(gè)學(xué)生非常愚鈍。

This book is rather dull. 這本書(shū)很枯燥。

All work and no play makes Jack a dull boy. 只工作不玩耍，聰明杰克也變傻。