The chief commodity produced in a district.

(常用复数)(一地区之)主要产品。

The principal element of something; chief item.

主要成分；要素。

Raw material for manufacture.

原料。

The fiber of cotton, flax, or wool.

(棉、麻或羊毛之)纤维。

Commodity in steady demand.

销路固定的商品。

Basic food item.

(常用复数)基本食料。

Chief; regularly produced.

主要的；固定生产的。

Marketable.

销售状况佳的。

To sort according to the equity of its fiber.

(依纤维之长短)分类。

A small U-shaped piece of metal, to be driven into wood to hold or fasten something.

马钉；U型钉。

Wire similarly bent to fasten papers together by being driven through with a special device and having the ends clinched on the other side.

钉书针。

To fasten with a staple or staples.

用钉书针钉住。