http://www.pons.de/produkte/3-12-517841-X/（牛津大学出版社授权产品）
http://www.pons.de/produkte/3-12-517841-X/（牛津大学出版社授权产品）
在《PONS词典》中的词汇
在《PONS词典》中的词汇
| I | activate |
|---|---|
| you | activate |
| he/she/it | activates |
| we | activate |
| you | activate |
| they | activate |
| I | activated |
|---|---|
| you | activated |
| he/she/it | activated |
| we | activated |
| you | activated |
| they | activated |
| I | have | activated |
|---|---|---|
| you | have | activated |
| he/she/it | has | activated |
| we | have | activated |
| you | have | activated |
| they | have | activated |
| I | had | activated |
|---|---|---|
| you | had | activated |
| he/she/it | had | activated |
| we | had | activated |
| you | had | activated |
| they | had | activated |
单语范例（未经PONS编辑处理）
The bottoms were seven feet thick and were grooved to ease the removal of sludge.
en.wikipedia.org Critics said the sludge should be used as fertilizer in agriculture.
en.wikipedia.org This results in the need for further treatment to remove the excess moisture from the sludge.
en.wikipedia.org Typical work involves diving into raw sewage or dangerous chemicals, such as paper pulp, liquid cement, or oil sludge.
en.wikipedia.org The distinguishing feature is that a faster rate of upward-flow velocity is designed for the wastewater passing through the sludge bed.
en.wikipedia.org