divining rod

基本解釋

What, you got a divining rod tattooed on your ass?
難道你的屁股有紋上卜問棒？
Using a divining rod, a dowser may find water, metals and other substances in the ground without the use of scientific tools.
占卜探測者從不需要科學儀器，依仗一根探測杖他們便可測出地下的水源，金屬，或者其他物質。
I think that the richest vein is somewhere hereabouts; so by the divining rod and thin rising vapors I judge; and here I will begin to mine.
由手中的探礦杖和前面升起的薄霧，我斷定附近某處就有那最富足的礦脈，而我，要開始開礦了。

And then, almost as if what he held was a divining rod, the staff in his hand pointed to the sky westerly.
NPR: E.L. Doctorow on Sherman and 'The March'
Next week brings the May nonfarm payrolls report, which many market watchers will use as a divining rod to ascertain whether the Federal Reserve and Ben Bernanke could actually start tapering their asset purchases before the summer is out, perhaps as early as late June.
FORBES: Strong May For Stocks Ends With A Rout On Wall Street

a rod, usually a forked hazel twig, said to move or dip when held over ground in which water, metal, etc, is to be found (Also called dowsing rod)