Excavator sales fell 10 percent in May from a year earlier, possibly foreshadowing a construction bust.

五月份挖掘机销售量同比下降10%，可能预示着建筑行业的不景气。

Foreshadowing: Some solution details.

铺垫：一些解决方案细节。

This is my usual trick of foreshadowing.

这是我惯用伎俩的伏笔。

It is the foreshadowing in theory at first.

首先是理论上的铺垫。

Subversion. Results, is the beginning of foreshadowing.

颠覆不了的结果，是最开始的伏笔。