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If a substance leaches, or is leached, water moving through a bigger mass — soil, ash, old rubbish, crushed rock — slowly carries that substance out.
If a substance leaches, or is leached如果一種物質被瀝濾（滲出）, water moving through水流過, a bigger mass — soil, ash, old rubbish, crushed rock較大量的東西——土壤、灰燼、舊垃圾、碎石, slowly carries that substance out就會慢慢把那個物質帶出來.
Rain can leach plant food from farm soil down into the ground; an old dump can leach chemicals into a river. Miners sometimes leach metal from crushed rock on purpose, by pouring liquid over it.
Rain雨水 can leach可以把 plant food植物養分 from farm soil從農地土壤裡 down into the ground瀝濾出來、往下滲到地底; an old dump一個舊垃圾場 can leach也可以把 chemicals化學物質 into a river瀝濾進河裡. Miners礦工 sometimes有時候 on purpose故意 by pouring liquid over it把液體澆在碎石上, leach把 metal金屬 from crushed rock瀝濾出來.
You will meet this in science, farming, and pollution news. It is not a kitchen word, though the idea is a little like tea colour leaving the leaves.
You will meet this你會在 in science, farming, and pollution news科學、農業和污染新聞裡看到這個詞. It不過它 is not不是 a kitchen word廚房用語, though the idea這個概念 is a little like有點像 tea colour leaving the leaves茶葉的顏色滲出來.
You can say the rain leached the minerals, or the minerals leached from the soil — both are used. Though actually it sounds like leech, the worm that drinks blood; that is a different word with a different spelling.
You can say你可以說 the rain leached the minerals雨水把礦物質瀝濾出來, or the minerals leached from the soil或說礦物質從土裡被瀝濾出來 — both are used這兩種說法都有人用. Though actually不過事實上 it sounds like它聽起來像 leech（水蛭）, the worm that drinks blood那種吸血的蟲, that is a different word那是不一樣的字 with a different spelling拼法也不同.
組成The noun comes from Middle English leche, an old word for a muddy stream or drain, going back to an old idea of liquid slipping through. The verb comes from Old English leccan, to water or make wet. Both sit with leak and lake.
原始詞典資料11 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
Leachname/liːt͡ʃ/
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A surname from Old English.
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A census-designated place in Delaware County, Oklahoma, United States.
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An unincorporated community in Carroll County, Tennessee, United States.
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A river in Gloucestershire, with a short stretch in Oxfordshire, England, which joins the Thames at Lechlade; in full, the River Leach.
leachnoun詞源 1/liːt͡ʃ/
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A quantity of wood ashes, through which water passes, and thus imbibes the alkali.
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A tub or vat for leaching ashes, bark, etc.
- "This is the leach," said Kitty, pointing to a large, yellowish, upright wooden cylinder, which rested on some slanting boards, down the surface of which ran a brownish liquid that dripped into a trough.
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A jelly-like sweetmeat popular in the fifteenth century.
leachverb詞源 2/liːt͡ʃ/
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To purge a soluble matter out of something by the action of a percolating fluid.
- Heavy rainfall can leach out minerals important for plant growth from the soil.
- [T]he very wet winter will have washed much of the goodness out of the soil. Homemade compost and the load of manure we get from a friendly farmer may not be enough to compensate for what has leached from the ground.
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To part with soluble constituents by percolation.
- The gangue was leached to recover minerals left behind by the original technology.
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To bleed; to seep.
- A more generic geography, one where the suburb uneasily abuts the commercial and industrial, or leaches out to a nonurban frontier.
- There's a second half to each video. He remembers now. He watched it passively, over and over, and never saw it. Something comes through. It's been leaching into the background of the world this whole time, in plain sight, and he never saw it, and it's here now—
這個拼法也被記錄為下列字的變化形：
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。