If a situation or activity is leavened by or with something, it is made more interesting or cheerful.
例句
His mood of deep pessimism cannot have been leavened by his mode of transport—a black cab...他極度悲觀沮喪，而他的代步工具——一輛黑色的出租車，絲毫不能舒緩這一情緒。He found congenial officers who knew how to leaven war's rigours with riotous enjoyment.他找到了懂得用狂歡來沖淡戰(zhàn)爭的嚴(yán)酷的志趣相投的軍官。
英英詞典釋義
Noun
1. an influence that works subtly to lighten or modify something;
"his sermons benefited from a leavening of humor"
2. a substance used to produce fermentation in dough or a liquid