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を落とす

to remove dirt or unwanted material from something

→ を
phrase Common #4,903
to remove dirt or unwanted material from something Used for washing or cleaning something off a surface.
JA: 石けんは泥を落とすのに役立つ。
EN: Soap helps remove mud.

石けんは泥を落とすのに役立つ。

Soap helps remove dirt.