Mary had to go to a meeting, so she left her children playing at home.
玛丽必须去开会，所以她把孩子们留在家里玩耍。
As usual, they'd left the children at home with the babysitter.
像往常一样，他们将孩子留在家里由保姆看管。
It is dangerous for children under five years old to be left alone at home.
把五岁以下的儿童独自留在家里是很危险的。
It is dangerous for children under five years old to be left alone at home.
把五岁以下的儿童独自留在家里是很危险的。
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