1.deal-(v)to occupy oneself or itself (usually fol. by with or in): Botany deals with the study of plants. He deals in generalities. 2.unless- (conjuction):except under the circumstances that: I'll be there at nine, unless the train is late. (preposition):2. except; but; save: Nothing will come of it, unless disaster. 3.unfair: (adjective)1. not fair; not conforming to approved standards, as of justice, honesty, or ethics: an unfair law; an unfair wage policy. 2. disproportionate; undue; beyond what is proper or fitting: an unfair share. 4.affect:(verb)1. to act on; produce an effect or change in: Cold weather affected the crops. (noun)Psychology. feeling or emotion. 5.solve (verb): 1. to find the answer or explanation for; clear up; explain: to solve the mystery of the missing books. 2. to work out the answer or solution to (a mathematical problem). 6.challenge:( noun) (verb)1. a call or summons to engage in any contest, as of skill, strength, etc. 2. something that by its nature or character serves as a call to battle, contest, special effort, etc.: Space exploration offers a challenge to humankind. 3. a call to fight, as a battle, a duel, etc. 7.regard:(verb)1. to look upon or think of with a particular feeling: to regard a person with favor. 2. to have or show respect or concern for. (noun)reference; relation: to err with regard to facts. 8.smart:(verb)1. to be a source of sharp, local, and usually superficial pain, as a wound. 2. to be the cause of a sharp, stinging pain, as an irritating application, a blow, etc. (adjective):having or showing quick intelligence or ready mental capability: a smart student. 9.duty:(noun)1. something that one is expected or required to do by moral or legal obligation. 2. the binding or obligatory force of something that is morally or legally right; moral or legal obligation. 10.instead:(adv). as a substitute or replacement; in the place or stead of someone or something: We ordered tea but were served coffee instead. 2. in preference; as a preferred or accepted alternative: The city has its pleasures, but she wished instead for the quiet of country life. (idiom):3. instead of, in place of; in lieu of: You can use milk instead of cream in this recipe. 打的我好酸,以上是用美式英语字典翻译的。