1N-COUNT (沙漠中的)绿洲 An oasis is a small area in a desert where water and plants are found. (沙漠中的)绿洲
2N-COUNT (恶劣环境中的)宜人之地,乐土;(不愉快情形下的)开心之时,乐事 You can refer to a pleasant place or situation as an oasis when it is surrounded by unpleasant ones. (恶劣环境中的)宜人之地,乐土;(不愉快情形下的)开心之时,乐事
The immaculately tended gardens are an oasis in the midst of Cairo's urban sprawl. [+ in]