astronaut- n. a person who travels in space
astronomy - n. the scientific study of stars and the universe
asylum -n. political protection given by a government to a person from another country
at - prep. in or near ("at the edge"); where ("look at"); when ("at noon")
atmosphere - n. the gases surrounding any star or planet
attach - v. to tie together; to connect
attack - n. a violent attempt to damage, injure or kill; v. to start a fight
attempt - v. to work toward something; to try; to make an effort
attend - v. to be present at
automobile - n. a vehicle with wheels used to carry people; a car
autumn - n. the time of the year between summer and winter
average - n. something (a number) representing the middle; ad. common; normal
avoid - v. to stay away from
awake - ad. not sleeping
award - n. an honor or prize for an act or service
away - ad. not near
发表于 2017-8-6 13:58:45