When a thing is scarce, it is precious. 物以稀为贵。
a vast, sparsely populated area; 地广人稀
The moon is bright and the stars are few. 月明星稀。
I'd like to have some liquid food. 我想吃点稀的。
This gruel is too thin. 粥太稀了。
Xi Xian 稀贤
牛津高阶第八版
美国韦氏词典
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维基百科 (自由的百科全书)