On holiday in Alaska, they made moulds of a Wolf's pawprint, a "science adventure".

在阿拉斯加度假期间，他们制作狼蹄印的印模，把此作为科学实践课。

When they go shopping, she teaches them economics. On holiday in Alaska, they made moulds of a wolf’s pawprint, a “science adventure”.

一次，在阿拉斯加度假，他们制作了狼足印记的模型，用妈妈的话来说，就是一次“科学探险”。