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。