You, you're not concentrating at all. You just muck about.

你，你上课一点也没专心，一直在闲游。

Something's been mucking about in our store.

我们店里出了什么事。

OK, let's recap the vocabulary from this programme, starting with mucking about, an informal way to say playing with something carelessly, not for a serious reason.

好，让我们回顾一下今天节词汇，从鼓捣开始，这是一种非正式说法，指是漫不经心地摆弄某物，不是出于正当理。

After the year 2000, 3D printers suddenly got much cheaper and tech companies started mucking about with them – spending time playing with them in a fun way.

2000年之后，3D打印机突然便宜了很多，科技公司开始鼓捣它们——以一种有趣方式花时间摆弄它们。

And yet, if you muck about with people who are doing artificial intelligence, some of the discussions are the most fascinating discussions I've ever had in my life.

不过如果跟人工智能领域人闲聊时候，有些对话是我人生最有意思一些了。

I don't consider them slang, or put quotation marks around them to show that I'm mucking about in the argot of the youth culture and really know better.

我不认为它们是俚语， 也不会在它们周围加上引号来表明我在使用青年文化行话， 而实际上我知道得更多。 它们是好词， 我们需要它们。