http://www.pons.de/produkte/3-12-517841-X/(牛津大学出版社授权产品)
I. clean <cleaner cleanest> [美 klin, 英 kliːn] 形
1.1. clean (not soiled):
1.3. clean (not used):
1.4. clean (pure, non-polluting):
2.1. clean (morally):
3. clean (unblemished):
4. clean (well defined):
II. clean [美 klin, 英 kliːn] 副 俗
III. clean [美 klin, 英 kliːn] 动词 trans
1. clean (remove dirt from):
IV. clean [美 klin, 英 kliːn] 动词 不及物动词
I. fluid [美 ˈfluɪd, 英 ˈfluːɪd] 名词 U or C
II. fluid [美 ˈfluɪd, 英 ˈfluːɪd] 形
2. fluid (not stable or fixed):
3. fluid 美 金融:
在《PONS词典》中的词汇
I. clean [kli:n] 形
2. clean (free from bacteria):
4. clean (morally acceptable):
I. clean [klin] 形
1. clean (free of dirt):
2. clean (free from bacteria):
4. clean (morally acceptable):
| I | clean | 
|---|---|
| you | clean | 
| he/she/it | cleans | 
| we | clean | 
| you | clean | 
| they | clean | 
| I | cleaned | 
|---|---|
| you | cleaned | 
| he/she/it | cleaned | 
| we | cleaned | 
| you | cleaned | 
| they | cleaned | 
| I | have | cleaned | 
|---|---|---|
| you | have | cleaned | 
| he/she/it | has | cleaned | 
| we | have | cleaned | 
| you | have | cleaned | 
| they | have | cleaned | 
| I | had | cleaned | 
|---|---|---|
| you | had | cleaned | 
| he/she/it | had | cleaned | 
| we | had | cleaned | 
| you | had | cleaned | 
| they | had | cleaned | 
