重点词汇
-
难以
difficult to; hard to
-
去除
remove; shed; shift; shake; squash; dislodge; dismiss; removal
-
污垢
dirt; filth; grime; stain; muck; smudge; soil; impurity
stubborn dirt
难以
difficult to; hard to
去除
remove; shed; shift; shake; squash; dislodge; dismiss; removal
污垢
dirt; filth; grime; stain; muck; smudge; soil; impurity