形 muddy，turbid，foolish，stupid；

[例句] 用不同颜色的毡头笔画草图，以免搞混。 Use different colours of felt pen on your sketch to avoid confusion.

[例句] 作为食品配给制的一种遗留影响，他们总把黄油和人造黄油混在一起吃。 As a hangover from rationing, they mixed butter and margarine.