她擦手后，裤子上留下了一个脏污的痕迹。
A dirty mark was left on her trousers after she wiped her hands.
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mark英 /mɑːk/|美 /mɑrk/
解释
mark 是名词，意思是"痕迹、印记"，指物体表面留下的可见痕迹或污渍。
A dirty mark was left on her trousers after she wiped her hands.
mark 是名词，意思是"痕迹、印记"，指物体表面留下的可见痕迹或污渍。
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