translation.en: And as it turns out, that's a really hard problem, because you have to build a small, portable robot that's not only really affordable, but it has to be something that people actually want to take home and have around their kids.
translation.zh: 我们发现，这确实是一个很难的问题， 因为这不仅要求你构造出来的机器人小巧、轻便， 成本控制在可接受的水平， 还要求你做出来的机器人 足够有趣，使得人们愿意把它们带回家，带给孩子。