We don’t start with models. We start with data. We don’t have any preconceived notions. We look for things that can be replicated thousands of times. A trouble with convergence trading is that you don’t have a time scale. You say that eventually things will come together.Well， when is eventually？

我们必须在经济增长和环境管理之间取得平衡。

The dairy sector must embrace technology to stay relevant.