A dieter is someone who is trying to become thinner by controlling what they eat. They may count what goes on the plate, skip foods they like, or follow a plan from a book or a phone.

A dieter is someone who is trying to become thinnerDieter 指的是想變瘦的人 by controlling what they eat藉由控制飲食。They may count what goes on the plate他們可能會計算盤子裡的份量、skip foods they like放棄自己喜歡的食物，or follow a plan from a book or a phone或是照著書上或手機裡的計畫走。

The word is everyday and a little informal, and the point is weight, not “eating well” in general. A person who chooses vegetables because they want to be healthy, but is not trying to get smaller, is not usually called a dieter.

The word is everyday and a little informal這個字很生活化、有點口語，and the point is weight重點在於體重，not "eating well" in general不是泛指「吃得健康」。A person who chooses vegetables because they want to be healthy一個因為想健康而選擇吃蔬菜的人，but is not trying to get smaller但沒有想要變瘦，is not usually called a dieter通常不會被稱作 dieter。

Though actually, people stretch it as a joke: “I’m a dieter this month” can mean a short no-sugar week, not a new identity.

Though actually不過其實，people stretch it as a joke人們也會開玩笑地把它用得更寬鬆："I'm a dieter this month"「I'm a dieter this month」can mean a short no-sugar week可能只是說這個月不吃糖一週，not a new identity不是換了一個新身分。

It is simply diet plus -er: the person who does the dieting. It is not a job title, and it is not the same as the trained food expert.

It is simply diet plus -er它就只是 diet 加上 -er：the person who does the dieting做 dieting 這件事的人。It is not a job title它不是一個職稱，and it is not the same as the trained food expert也不等於受過訓練的營養專家。