If something is adjustable, you can change it a little — move it, lengthen it, tighten it — so that it fits a different person or a different job. An adjustable chair goes up and down; an adjustable strap gets longer or shorter; an adjustable lamp turns where you need the light.

If something is adjustable如果某個東西是adjustableyou can change it a little你可以稍微調整它move it, lengthen it, tighten it移動它、拉長它、拉緊它so that it fits a different person or a different job這樣它就能適合不同的人或不同的用途An adjustable chair goes up and down可調整的椅子可以升降an adjustable strap gets longer or shorter可調整的帶子可以變長變短an adjustable lamp turns where you need the light可調整的燈可以轉到你需要光的地方

The word is ordinary and practical, used on product labels and in shops. It does not mean "we already changed it"; it means "it is built so that you can change it".

The word is ordinary and practical這個字很普通、很實用used on product labels and in shops常出現在產品標示和店裡It does not mean "we already changed it"它的意思不是「我們已經改過了」it means "it is built so that you can change it"而是「它做成可以讓你去調整」

Though actually, it usually means small, useful changes, not making a new thing from the old one. A belt can be adjustable; a law is not, in everyday talk.

Though actually不過其實it usually means small, useful changes通常是指小小的、有用的調整not making a new thing from the old one而不是把舊的東西變成一個新東西A belt can be adjustable皮帶可以是adjustablea law is not, in everyday talk但日常說法裡，法律不會這樣說