这是非常令人担忧的很多家长和非常令人沮丧的-一旦孩子学会了如何做到这一点，它是很难阻止他们。
This is extremely worrying for many parents and very frustrating - once a child has learnt how to do this, it is very difficult to stop them.
这是非常令人担忧的很多家长和非常令人沮丧的-一旦孩子学会了如何做到这一点，它是很难阻止他们。
This is extremely worrying for many parents and very frustrating - once a child has learnt how to do this, it is very difficult to stop them.
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