straw in the wind 迹象；苗头；征兆

【例句】
The move is an intriguing straw in the wind of some bigger shifts in Washington.
此举是一个耐人寻味的苗头，预示着华盛顿某些更重大的转变。

The latest straw in the wind is a pick-up in sales among the nation's retail giants.
最新的迹象是该国几家零售巨头的销售额有所上升。