门上的铃铛是洁的——门算房子的一部分,房子连于地,故不沾不洁,连在门上的也随它。
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门上的铃铛却是洁的。
and the bell of a door is ritually pure.
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门自身不算器皿。
The door itself is not considered a vessel.
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它算作房子的一部分,所以身分与房子一样。
It is considered part of the house, and therefore its status is like that of the house.
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房子连于地,所以不沾不洁。
The house is attached to the ground, and therefore it cannot become ritually impure.
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凡连在它上头的(铃铛也在内)都随它这一样身分。
Everything connected to it, including the bell, assumes that status.