be covered in mud
mud 作“泥”讲时通常不可数，前面不加 a/an，也不用复数。
After the rain, the path was covered in mud.
雨后，小路上覆满了泥。
诽谤；中伤；恶语；墙泥；嵌缝泥；钻井泥浆；泥粒；粉砂；（肛交时露出的）粪便
Wet, soft earth; a mixture of soil and water.
水和土壤或细颗粒沉积物的混合物
A mixture of water and soil or fine grained sediment.
浸水的土壤；湿软的泥土
water soaked soil; soft wet earth
用于纹理或平滑干墙的类似石膏的混合物
A plaster-like mixture used to texture or smooth drywall.
诽谤性言论或指控
slanderous remarks or charges
故意的辱骂性甚至诽谤性的言论或主张,尤其在政治对手之间
Willfully abusive, even slanderous remarks or claims, notably between political opponents.
因肛交而暴露的粪便
Stool that is exposed as a result of anal sex.
直径小于62.5微米的颗粒,依据温特沃斯尺度
A particle less than 62.5 microns in diameter, following the Wentworth scale
钻井液
Drilling fluid.
英国土地法中的不动产
real property in English Land Law
After the rain, the path turned into thick mud.
雨后，小路变成了厚厚的泥浆。
用法提示：此处“mud”为名词，意为湿软的泥土。
The children enjoyed playing in the mud.
孩子们喜欢在泥巴里玩耍。
用法提示：此处“mud”为名词，指泥巴。
His boots were covered in mud after the hike.
徒步旅行后，他的靴子上沾满了泥。
用法提示：此处“mud”为名词，指泥泞。
mud 作“泥”讲时通常不可数，前面不加 a/an，也不用复数。
After the rain, the path was covered in mud.
雨后，小路上覆满了泥。
mud 可直接放在名词前作定语，说明材质，如 mud hut、mud wall、mud brick。
They live in a small mud hut.
他们住在一间小小的泥屋里。
要指不同种类的泥时，可以用复数形式 muds。
The spa uses several mineral muds in its treatments.
这家水疗中心在护理中使用好几种矿物泥。
grammar · medium
易错句子After the rain, there were many muds on the road.
正确表达After the rain, there was a lot of mud on the road.
表示“湿泥、烂泥”这一物质义时，mud 是不可数名词，不能用 many 修饰，也不能加 -s 表示数量；muds 只在指“不同种类的泥”时才用。因此数量表达用 a lot of / much + mud，动词用单数 was。
grammar · medium
易错句子My boots were mud after the walk.
正确表达My boots were muddy after the walk.
描述“沾满泥的”状态要用形容词 muddy 作 be 的表语；mud 是名词，不能直接作表语。中文“靴子上全是泥”用名词短语作谓语，容易迁移成英语的名词表语。
grammar · medium
易错句子The artist made the pot out of mud.
正确表达The artist made the pot out of clay.
做陶器的原料是 clay（黏土），不是 mud；mud 指水和土混合的“湿泥、烂泥”，不是制陶材料。中文“泥”兼指两者，容易用 mud 表示黏土。
mire 指深陷的沼泽、烂泥地，带书面和文学色彩，也常比喻困境；mud 则是日常中性的词，泛指湿软的泥土本身，不含“陷入其中”的意思。
sludge 指黏稠肮脏的泥状沉积物，多用于污水、工业废料等负面语境；mud 是自然形成的湿土，本身不带“污废”含义。
dirt 泛指泥土、脏东西，通常是干的，强调“脏”；mud 特指掺了水、湿软的泥。干燥的地面或身上的土用 dirt，雨后湿软的泥用 mud。
泥坑
The car got stuck in a mud puddle.
汽车陷进了一个泥坑里。
泥石流
Heavy rain caused a mud slide that blocked the road.
大雨导致泥石流堵塞了道路。
泥浴
She enjoyed a relaxing mud bath at the spa.
她在水疗中心享受了一次放松的泥浴。
诋毁，中伤
Politicians often throw mud at each other during campaigns.
政客们在竞选中经常互相诋毁。
玷污名声
The scandal dragged his reputation through the mud.
丑闻玷污了他的名声。
一点不清楚，模棱两可
His explanation was as clear as mud.
他的解释一点不清楚。
保守的人，跟不上时代的人
Don't be such a stick in the mud; join the party!
别这么保守，来参加派对！
诽谤，中伤
The campaign turned into mud slinging.
竞选变成了互相诽谤。
泥巴，泥巴，壮观的泥巴
After the rain, the children were covered in mud, playing in the garden.
雨后，孩子们在花园里玩，浑身都是泥巴。
泥巴会把你吞没。
He warned them not to go near the swamp, because the mud could swallow them up.
他警告他们不要靠近沼泽，因为泥巴可能会把他们吞没。
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.