http://www.pons.de/produkte/3-12-517841-X/（牛津大学出版社授权产品）
I. roughen [美 ˈrəfən, 英 ˈrʌf(ə)n] 动词 trans
在《PONS词典》中的词汇
在《PONS词典》中的词汇
| I | roughen |
|---|---|
| you | roughen |
| he/she/it | roughens |
| we | roughen |
| you | roughen |
| they | roughen |
| I | roughened |
|---|---|
| you | roughened |
| he/she/it | roughened |
| we | roughened |
| you | roughened |
| they | roughened |
| I | have | roughened |
|---|---|---|
| you | have | roughened |
| he/she/it | has | roughened |
| we | have | roughened |
| you | have | roughened |
| they | have | roughened |
| I | had | roughened |
|---|---|---|
| you | had | roughened |
| he/she/it | had | roughened |
| we | had | roughened |
| you | had | roughened |
| they | had | roughened |
无例句可用
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单语范例（未经PONS编辑处理）
The particular objects (such as a vase) were first roughened by engraving or using hydrofluoric acid to etch a design.
en.wikipedia.org The surface is dry, often roughened and pitted, and with a network of grooves or ridges (striations) or reticulations near the top of the stem.
en.wikipedia.org The bark is smooth light gray, roughened by many narrow ridges.
en.wikipedia.org The whole surface is further roughened by microscopic flexuous wrinklings.
en.wikipedia.org The five whorls are separated by canaliculate sutures, convex, the embryonic ones smooth, the rest roughened.
en.wikipedia.org