【水土不服】〖shu t bù fú〗[climate does not suit one;climate of the place does not agree with one; find oneself in unaccustomed climate; not acclimatized]

水乳交融著诗典，

土洋并举汉英翻。

不拘一体世界语，

服意输心大同寰。

对于一个地方的气候条件或饮食习惯不能适应。Can't adapt climate conditions or eating habits of a place.