Like Trying to Nail Jello to a Tree——不可能的

** very difficult or impossible to accomplish(非常困難或不可能做到的)

~~不可能的任務；不可能的；太難了；不可能做到的；很難對付的；很難處理的；不會有的；不會發生的；不能相信的

~~ like trying to nail jello to a wall; exceptionally difficult; extremely hard; incredibly complicated; really challenging; terribly tough; enormously complex; extraordinarily intricate; inconceivable; unimaginable; impractical

!! U.S. President Theodore Roosevelt might have invented the idea behind this expression, although not the exact words. On July 2, 1915, he sent a letter to William Roscoe Thayer, in which he described the difficulty of negotiating with Colombia regarding the Panama Canal. He wrote: "You could no more make an agreement with them than you could nail currant jelly to a wall -- and the failure to nail currant jelly to a wall is not due to the nail; it is due to the currant jelly."

美國總統西奧多 · 羅斯福可能發明了這個方式表達背後的想法，儘管不是確切的用詞。一九一五年七月二日，他致函威廉 · 羅斯科 · 塞耶，在信中描述了與哥倫比亞談判巴拿馬運河問題的困難。他寫道：“你無法與他們達成協議，就像你無法將小葡萄乾果凍釘在牆上一樣——未能將小葡萄乾果凍釘在牆上並不是因為釘子，而是因為小葡萄乾果凍。”

>> If we insist on building an anti-epidemic hospital in Macau within one week, it would be like trying to nail jello to a tree.

如果堅持要一星期內在澳門設置一所防疫醫院，這是近乎不可能的任務。

>> Teaching my 20-years-old dog a new trick is like trying to nail jello to a wall.

把一個新技巧教給我二十歲的狗，是不可能的。

學勤進修教育中心英語專科導師

李啓文 教授