to start with造句

To start with, where and when did it happen?
首先，这事发生在何时何地？

Well, maybe it would be easier to start with a smaller problem.
那么，也许从小问题入手会更容易些。

Success was assured and, at least to start with, the system operated smoothly.
成功有保证了，至少该系统一开始运行得挺顺利。