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”。
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