这些活动有助于儿童培养自身的价值感。
The activities help children to develop a sense of their own worth.
这项调查对于儿童语言的研究将极有价值。
The research should prove invaluable in the study of children's language.
对于许多有价值的事情而言，如儿童看护和友谊等，它是必要的条件。
It's a necessary condition for many worthwhile things: child care, friendships, etc.
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