同final, terminal, eventual
"Our ultimate goal is to find a cure for AIDS," said the scientist.
vacant adj.空的n. vacuum
同empty, available, disengaged, unoccupied
Children in the neighborhood liked to play in a nearby vacant lot.社区里的小孩儿喜欢在附近的空地上玩耍。
同give up, relinquish, renounce, abandon
Our school waives its strict dress code once a week and allows us to wear what we want on that day.
Ms. Harris asked her secretary to Xerox seven copies of the contract.