oasis
/əʊˈeɪsɪs/noun
(pl. oases /-siːz/ )
1
- a fertile spot in a desert, where water is found（沙漠中的）绿洲。
1.1
- figurative a pleasant or peaceful area or period in the midst of a difficult, troubled, or hectic place or situation〈喻〉“绿洲”（指艰难、困扰或忙乱中宁静而令人愉悦的场所或喘息时期）：
an oasis of calm in the centre of the city.
市中心一片宁静的“绿洲”。
2
Oasis
mass noun trademark a type of rigid foam into which the stems of flowers can be secured in flower arranging〈商标〉（插花时将花茎插牢于其中的）插花泥。
词源
early 17th cent.: via late Latin from Greek, apparently of Egyptian origin.