n.迟钝；不清楚；单调；[医]浊音
英英释义
"the stories were of a dullness to bring a buffalo to its knees"
"the brightness of the orange sky was reflected in the dullness of the orange sea"
"there was a dullness in his heart"
"without him the dullness of her life crept into her work no matter how she tried to compartmentalize it."
"the dullness of the pencil made his writing illegible"
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