The thin, watery, slightly yellow-green liquid left over when milk turns solid — when it goes sour, or when a cheesemaker adds something to make it curdle. The lumps that form are the curds; the liquid that drains away is the whey. It is a mass noun, so no "a" and no plural.

The thin, watery, slightly yellow-green liquid指的是那種稀薄、水水的、帶點黃綠色的液體 left over when milk turns solid牛奶變固體時剩下來的 — when it goes sour不管是牛奶變酸了, or還是 when a cheesemaker adds something to make it curdle起司師傅加了東西讓它凝結. The lumps that form形成的那些塊狀物 are the curds叫做curds（凝乳）; the liquid that drains away流出來的液體 is the whey就叫做whey（乳清）. It它 is a mass noun是不可數名詞, so所以 no "a" and no plural前面不加『a』，也沒有複數形.

Most learners meet it now through the gym: whey protein powder is made by drying this liquid, because the leftover liquid turns out to be full of protein. That is a fairly recent turn — for most of history whey was the cheap by-product farmers fed to pigs.

Most learners大部分學英文的人 meet it now現在...認識這個詞 through the gym是透過健身房: whey protein powderwhey protein powder（乳清蛋白粉） is made by drying this liquid就是把這種液體烘乾做成的, because因為 the leftover liquid這種剩下來的液體 turns out to be full of protein其實富含蛋白質. That是 is a fairly recent turn相當晚近才有的用法 — for most of history在歷史上大部分時間裡, whey whey was the cheap by-product只是廉價的副產品 farmers fed to pigs農夫拿來餵豬的.

You also meet it in the old nursery rhyme about Little Miss Muffet eating her curds and whey. It sounds exactly like "way", which is worth knowing before someone says it to you out loud.

You你 also meet it也會遇到它 in the old nursery rhyme在那首古老童謠裡 about Little Miss Muffet eating her curds and whey講Little Miss Muffet吃curds and whey的. It它 sounds exactly like "way,"的發音跟『way』完全一樣, which這點 is worth knowing最好先知道 before someone says it to you out loud在有人念給你聽之前.