mud的形容词形式是：muddy， 意为：泥泞的。
例句：
The ground was still very muddy.
地上还很泥泞。
The men had to slog up a steep muddy incline
人们只得在陡峭而泥泞的斜坡上艰难地行进。
Crabs scuttle along the muddy bank.
几只螃蟹沿着泥泞的河堤快速横行。
The arena was scarred by deep muddy ruts.
赛场上留下了深深的车辙泥痕。
This water is too muddy, let it settle before use.
这水太浑，等澄清了再用吧。
It was hard to get over the muddy road.
那条烂泥路很难走。
The only access to that building is along that muddy track.
到那幢楼房的惟一通道是那条泥泞的小路。
The water is very muddy.
水浑得很。
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