grime
/graɪm; ɡraɪm/ n[U]
dirt, esp in a layer on a surface 尘垢（尤指表面上的一层）; 污垢
the soot and grime of a big manufacturing town 大工业城市的煤烟与尘垢
a face covered with grime and sweat 满是污垢和汗水的脸. grime, v [Tn esp passive 尤用於被动语态]
make (sb/sth) dirty 将（某人[某物]）弄脏
a face grimed with dust 沾有灰尘的脸.