spend on doing

In fact, I highly recommend if you get involved in using WEKA on your server, you spend some time doing that, since working with data in this way is tedious.

实际上，我强烈建议如果打算在服务器上使用WEKA，那么就不要怕花时间，因为以这种方式处理数据是很繁琐的。

In my opinion, I think the most important part of raising well-behaved kids is spend one-on-one time with them doing things they enjoy.

在我看来，培育举止得体的孩子最重要的部分在于花一对一的时间与孩子们做他们喜欢的事。

Then we could spend our money on seeing the world and doing things (such as visiting friends) instead of on chimneys and deck repairs and paint jobs and transmissions.

这样一来，我们就可以把钱花在环游世界和其他事情上(比如说探亲访友)，而不是花在烟囱桌子的维修以及油漆和运输工作上了。