crude
单词辨析：
指存在或发生于自然界的，含非人力所为之意，也指食物没有添加其他成分的。
the natural world
自然界
natural disasters/resources
自然灾害/资源
This is a natural phenomenon that happens about once a century.
这是一种自然现象，几乎每个世纪都要发生一次。
She cooks with natural ingredients only.
她做饭只用纯天然的佐料。
主要指石油、橡胶等未经化学加工、尚处于自然状态的，只作定语。
Gasoline is made from crude oil.
汽油是从原油中提炼出来的。
They imported crude rubber from Malaysia.
他们从马来西亚进口生胶。
指物质未经加工、依然处于自然状态的。
raw coal/oil/ore/silk
原煤/原油/原矿石/生丝
The factory is in frequent scarcity of raw materials.
这家工厂经常原料不足。
He also imported raw cotton from America in his own ships.
他也用自己的船从美国进口原棉。
指物质处于天然或未经精炼状态的，通常含有其他杂质。
unrefined lard/sugar/syrup
未提炼的猪油/原糖/未精制的糖浆
指制作不够精细的，或表面不平滑的。
Why was this rough wooden table so expensive?
为什么这张粗糙的木桌如此昂贵？
Rough skin is a very common problem affecting many people.
皮肤粗糙是困扰很多人的常见问题。
指皮肤或布料不光滑的，也指构成部分粗大的。
Her coarse hands are the result of years of hard work.
她粗糙的双手是常年艰辛劳作的结果。
His new jacket of coarse wool failed to keep him warm.
他新买的粗羊毛夹克衫不保暖。
Coarse salt shouldn't be used if you want to make tasty cakes.
如果你想做出美味的蛋糕，那么不要用粗盐。
指制作水平不高、细节欠雕琢打磨的。
In spite of its crude workmanship, this type of vase sells well.
尽管工艺粗糙，这款花瓶销量很好。
He can only provide a crude drawing of the thief's face.
他只能描画出窃贼脸部的大致轮廓。
指房屋简陋的，或设施不完备的。
Is there anyone who can really live in that rude wooden hut for one year?
真的有人能够在那件简陋的小木屋里生活一年吗？
相关例句：
On the eve of the Revolution, the colonies produced thirty thousand tons of crude iron a year.
独立战争前夕，北美十三州每年生产3万吨生铁。
To be crude and careless is an extremely bad style of work.
粗枝大叶是一种极坏的作风。
Gasoline is distilled from crude oil.
汽油是从原油中提炼出来的。
The pipeline carries crude oil direct from the oil field to the harbour.
油管把原油从油田直接输往港口。
OPEC has agreed to freeze its global oil production slightly in order to firm up crude prices.
石油输出国组织已同意对全球石油生产稍加冻结，以稳定原油价格。
Contrary to popular belief, the oil companies can't control the price of crude
与人们普遍的看法相反，石油公司并不能控制原油价格。