对于孩子们来说，参观一个水族馆是了解海洋生物最好的途经，他们也许还想在家放一个养鱼缸，并加入到全世界数百万养鱼者的行列。
Visiting an aquarium is a good way for children to learn about sea creatures. They might even want to start an aquarium at home and join the millions of people around the world who keep fish as pets.
但是这如果意味着他们的孩子被扔在电视机前，由一个便宜的保姆看管，那么，这些孩子也许还不如与母亲一起呆在家里。
But if it means their children are dumped in front of the telly at a cheap childminder, the kids may be worse off than if they were at home with mum.
她决心离开是为了这些更小的孩子们能得到更大的好处；如果她留在家里不走，他们也许从她的管教中得不到丝毫好处，反而会因她的榜样受害。
This leaving of the younger children she had decided to be for the best; were she to remain they would probably gain less good by her precepts than harm by her example.
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