在公共区立安息之居须放两餐之食;合界放在坑里十掌以上有效,十掌以下无效。
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人要在公共区某一处立自己安息日的居所,须在那一处放下够两餐的食物,那一处才算作他律上的居所。
One who intended to establish his Shabbat abode in the public domain at a specific site must place food sufficient for two meals for that site to be considered his legal residence.
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他若把作 合界 用的食物放在坑里、离地面不足十掌深之处,他的 合界 有效。
And if he placed the food used for his eiruv in a pit above ten handbreadths, i.e., less than ten handbreadths below ground level, his eiruv is an eiruv.
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他若把 合界 放在离地面十掌以下之处,他的 合界 就无效。
If he placed the eiruv below ten handbreadths from ground level, his eiruv is not an eiruv.
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因为那坑是私人区,他不可把 合界 从那私人区拿到自己立居所的公共区去,所以那 合界 不算数。
Because the pit is a private domain and he may not carry the eiruv from that private domain to a public domain, where he has established his residence, the eiruv is invalid.