Dr Langbein is optimistic that his methods can be improved further.

朗本博士对此很乐观，他认为这一方法可以再加改进。

The next step, says Dr Langbein, is to see if cattle on a working farm can be similarly trained.

朗本博士说，下一步是看看农场里的牛是否能够接受类似训练。

As Dr Langbein describes in Current Biology, this conundrum could be solved if free-roaming cows could be persuaded to voluntarily relieve themselves in a latrine.

正如朗本博士在《当代生物学》中所描述的那样，如果能够说服自由漫步的奶牛自愿在厕所中小便，那么这个难题就可以解决。

Now, in the hope of fighting climate change, Dr Jan Langbein, of the Fredrich-Loweffler-Institut in Germany, and his colleagues hope they can train cows to use the toilet, too.

现在，为了对抗气候变化，德国Fredrich Loweffler研究所的扬·朗本博士和他的同事们希望也能训练奶牛上厕所。