http://www.pons.de/produkte/3-12-517841-X/(牛津大学出版社授权产品)
 
  
 I. concentrate [美 ˈkɑnsənˌtreɪt, 英 ˈkɒns(ə)ntreɪt] 动词 trans
1. concentrate energies/attention/activities:
2.1. concentrate (gather, bring together):
-  to concentrate sth in/into sth
-  
2.2. concentrate (increase strength of):
II. concentrate [美 ˈkɑnsənˌtreɪt, 英 ˈkɒns(ə)ntreɪt] 动词 不及物动词
1. concentrate (focus attention):
2. concentrate (converge):
-  concentrate people/group/crowd:
-  
III. concentrate [美 ˈkɑnsənˌtreɪt, 英 ˈkɒns(ə)ntreɪt] 名词 U
 
  
 在《PONS词典》中的词汇
 
  
 I. concentrate [ˈkɒnsəntreɪt, 美 ˈkɑ:n-] 动词 不及物动词
1. concentrate (focus one's thoughts):
2. concentrate (gather):
II. concentrate [ˈkɒnsəntreɪt, 美 ˈkɑ:n-] 动词 trans
1. concentrate (focus):
-  concentrate search
-  
2. concentrate (accumulate):
-  concentrate population
-  
3. concentrate (not dilute):
III. concentrate [ˈkɒnsəntreɪt, 美 ˈkɑ:n-] 名词
 
  
  
  
 I. concentrate [ˈkan·sən·treɪt] 动词 不及物动词
1. concentrate (focus one's thoughts):
2. concentrate (gather):
II. concentrate [ˈkan·sən·treɪt] 动词 trans
1. concentrate (focus):
-  concentrate search
-  
2. concentrate (accumulate):
-  concentrate population
-  
3. concentrate (not dilute):
III. concentrate [ˈkan·sən·treɪt] 名词
| I | concentrate | 
|---|---|
| you | concentrate | 
| he/she/it | concentrates | 
| we | concentrate | 
| you | concentrate | 
| they | concentrate | 
| I | concentrated | 
|---|---|
| you | concentrated | 
| he/she/it | concentrated | 
| we | concentrated | 
| you | concentrated | 
| they | concentrated | 
| I | have | concentrated | 
|---|---|---|
| you | have | concentrated | 
| he/she/it | has | concentrated | 
| we | have | concentrated | 
| you | have | concentrated | 
| they | have | concentrated | 
| I | had | concentrated | 
|---|---|---|
| you | had | concentrated | 
| he/she/it | had | concentrated | 
| we | had | concentrated | 
| you | had | concentrated | 
| they | had | concentrated | 
