oasis

1. N-COUNT An oasis is a small area in a desert where water and plants are found. (沙漠中的) 绿洲

2. N-COUNT You can refer to a pleasant place or situation as an oasis when it is surrounded by unpleasant ones. 绿洲般的地方

The immaculately tended gardens are an oasis in the midst of Cairo's urban sprawl. 那些打理得非常整洁的花园是杂乱扩张的开罗市区中的一片绿洲。