Yum is the sound you make when food tastes good, used as a word. It is a whole sentence by itself — you say it and stop. Someone puts a plate in front of you, you look at it, you say "Yum!" You take the first bite and say it again.

YumYum is the sound you make是你發出的聲音，when food tastes good當食物好吃的時候，used as a word被當成一個字來用。It is a whole sentence by itself它自己就是一整句話——you say it and stop說完就停了。Someone puts a plate in front of you有人把一盤菜放在你面前，you look at it你看著它，you say "Yum!"你說「Yum!」——You take the first bite你吃了第一口，and say it again又說了一次。

It is very informal and slightly childlike. Adults do say it, especially in relaxed company or writing to friends, but a teacher would not write it in an essay. Children say it constantly, and parents say it back to them, sometimes stretched out: "Yum yum!" You will also see it doubled and hyphenated in the fixed phrase yum-yum.

It is very informal這個字很口語，and slightly childlike也有一點孩子氣。Adults do say it大人也真的會說，especially in relaxed company or writing to friends尤其是在輕鬆的場合或寫訊息給朋友的時候，but a teacher would not write it in an essay但老師不會把它寫進作文裡。Children say it constantly小孩會一直說，and parents say it back to them家長也會回應他們，sometimes stretched out有時候還會拉長音："Yum yum!"「Yum yum!」You will also see it doubled and hyphenated你也會看到它疊字加連字號 in the fixed phrase yum-yum變成固定用語yum-yum。

Online it is everywhere — under photos of food, as a comment on its own, often just "yum" with no capital letter and no punctuation.

Online在網路上 it is everywhere到處都看得到：under photos of food在食物照片下面、as a comment on its own單獨當一則留言，often just "yum"常常就只打「yum」，with no capital letter and no punctuation不大寫、也不加標點。

Two useful stretches. First, English lets people say it for things they merely want, not only taste: someone posting a picture of a beach might joke "yum," and people also say it about an attractive person, which can be flirty or rude depending on who says it to whom. Be careful there.

Two useful stretches有兩種實用的延伸用法。First第一種，English lets people say it for things they merely want英文讓人可以用它來講單純想要的東西，not only taste而不只是味道：someone posting a picture of a beach有人貼一張海灘的照片 might joke "yum,"可能會開玩笑打「yum」，and people also say it about an attractive person大家也會用它來形容有吸引力的人，which can be flirty or rude depending on who says it to whom這可能是調情，也可能很沒禮貌，要看是誰對誰說。Be careful there這裡要小心。

Second, its opposite is yuck (or eww) — that pair, yum and yuck, is one of the first things English-speaking children learn to sort the world with.

Second第二種，its opposite is yuck (or eww)它的反義詞是yuck（或eww）——that pair, yum and yuck這一對，yum和yuck，is one of the first things English-speaking children learn to sort the world with是說英語的小孩最早用來分辨世界的字之一。

The word is imitative: it copies the noise of enjoying a mouthful, the same way "boom" copies an explosion. That is why every language has something like it and none of them quite match.

The word is imitative這個字是擬聲詞：it copies the noise of enjoying a mouthful模仿吃一口東西時發出的聲音，the same way "boom" copies an explosion就像「boom」模仿爆炸聲一樣。That is why這就是為什麼，every language has something like it每種語言都有類似的字，and none of them quite match但沒有一個完全一樣。