New    Known    Review  | 
arduous  | 
        
| 
 | 
        
a. 努力,奮發 demanding great effort or labor; difficult Her arduous efforts had sapped her energy.  | 
        
  New    Known    Review  | 
  New    Known    Review  | 
aria  | 
        
| 
 | 
        
n. 獨唱曲 operatic solo; a solo vocal piece with instrumental accompaniment Of course, throwing a pop star at an aria is a particularly uninspired solution.  | 
        
  New    Known    Review  | 
arid  | 
        
| 
 | 
        
a. 荒蕪的 dry; lacking moisture, especially having insufficient rainfall to support trees or plants The cactus has adapted to survive in an arid environment.  | 
        
  New    Known    Review  | 
arise  | 
        
| 
 | 
        
v. 出現,發生,起來,站起 come up from a lower to a higher position; come above the horizon; spring up; come into action The problem may not arise, but there's no harm in keeping our powder dry.  | 
        
  New    Known    Review  | 
  New    Known    Review  | 
armory  | 
        
| 
 | 
        
n. 紋章,兵工廠,軍械庫 arsenal; a place where arms are manufactured The adjutant general may designate an officer to be in direct charge of each armory, arsenal, camp, base, or other facilities.  | 
        
  New    Known    Review  | 
aroma  | 
        
| 
 | 
        
n. 香氣,芬芳,芳香 fragrance; scent; pleasant characteristic odor, as of a plant, spice, or food The aroma is distinctive, but in the end, it's a lemon.  | 
        
  New    Known    Review  | 
aromatic  | 
        
| 
 | 
        
a. 芬芳的 fragrant or sweet-smelling; caused by fragrant odor Medieval sailing vessels brought aromatic herbs from China to Europe.  | 
        
  New    Known    Review  | 
arouse  | 
        
| 
 | 
        
v. 刺激,激起,喚醒 excite; stimulate; awaken from or as if from sleep He suddenly seemed to arouse himself: the conviction of the reality seized him.  | 
        
  New    Known    Review  | 
  New    Known    Review  | 
  New    Known    Review  | 
arthritis  | 
        
| 
 | 
        
n. 關節炎 inflammation of a joint or joints Multiple treatments have shown success in treating arthritis symptoms, that is, in the relief of symptoms.  | 
        
  New    Known    Review  | 
article  | 
        
| 
 | 
        
n. 論文,文章 essay; editorial; individual thing or element of a class An article in a national newspaper caused the protests.  | 
        
  New    Known    Review  | 
articulate  | 
        
| 
 | 
        
a. 有效的,獨特的 expressing oneself easily in clear and effective language Her articulate presentation of the advertising campaign impressed her employers.  | 
        
  New    Known    Review  | 
artificial  | 
        
| 
 | 
        
a. 人造的,人工的 made by humans; produced rather than natural. Researchers have found that kangaroos often become accustomed to these artificial sounds and take little notice of them.  | 
        
  New    Known    Review  | 
  New    Known    Review  | 
artisan  | 
        
| 
 | 
        
n. 工匠 manually skilled worker; craftsman, as opposed to an artist A noted artisan, Arturo, was known for the fine craftsmanship.  |