漂亮！比平时看到的更精彩。

来源: 老林子里的夏天 于 2024-03-24 16:48:46 [] [博客] [旧帖] [给我悄悄话] 本文已被阅读： 次 (570 bytes)
回答: 3月芝加哥河被绿了 太美了 由 jmzjmz 于 2024-03-23 16:59:09

That first year, the Chicago Journeyman Plumbers Union dumped 100 pounds of dye into the river, turning it green for a solid week. Nowadays, the union uses about 40 pounds of vegetable-based powder dyes that are more environmentally friendly and turn the river green for just a few days.------《How and Why Chicago Turns Its River Green for St. Patrick's Day》

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