adj.呆滞的；钝的；迟钝的；无趣的；暗的
v.变钝；迟钝
Jack had all work but no play, making him a dull boy. 杰克只学不玩,这使得他成为一个呆笨的孩子。
It's impossible to cut a pineapple with such a dull knife. 用一把这么钝的刀子切菠萝是不可能的。
The mind becomes dull if the body doesn't get on exercise. 要是身体得不到锻炼,头脑也会迟钝的。
This book is rather dull. 这本书很枯燥。
The dying fire was throwing out a dull red light. 将要熄灭的火发出暗红色的光。
用作动词 (v.)The heating was turned up high to dull his audience's senses. 暖气温度被调到很高，以至于听众的意识变得迟钝。
She gave me some medicine to dull the pain. 她给了我一些可减轻疼痛的药。
The sensory nerves of this old man seem to dull. 这位老人的感觉神经似乎不太敏锐了。
dull可用作定语、表语或宾语补足语。
dull的比较级为duller,最高级为dullest。
