drill hole

基本解釋

"The drill hole is just a pinprick on an elephant's back, " he said.
“鑽井對(duì)於整個(gè)巖漿躰來說衹不過是大象背上的一個(gè)小針孔?！?馬施說。
Drilling: refers to the use of drilling or milling machine drill hole of the workpiece process.
鑽孔：指在鑽牀或銑牀上使用鑽頭對(duì)工件進(jìn)行打孔的工藝過程。
www.spk-dg.com
In general can be twist drill hole, but you should drill holes, step and then expanded to the required diameter.
用一般的麻花鑽即可開孔，但應(yīng)先鑽小孔，然後步擴(kuò)大到所需直逕。
www.jsd-jasper.com

What they've done before the commercial versions is using, like, five-gallon buckets of this drill hole in the bottom, so they can plant through, put some dirt in and hang it up.
NPR: Vegetable Gardening On A Budget
Either way it is particularly disappointing when you drill a dry hole such as happened to the partners in the Blueberry Hill side-track well (EXXI was not among them), which found nothing and required a write-down in the quarter, surely a factor in the price drop of the stock.
FORBES: Magazine Article