Customers may demand a full refund if they find the products less effective than promised. 
假如顧客覺得產品不符效果保證，他們可以要求全額退款。

When Arthur told the clerk that he was not satisfied with the product, she offered to refund his money.
當亞瑟告訴店員他對這產品不滿意時，她主動提出要退還他的錢。

When will you return to Taiwan?
你什麼時候會回臺灣？

You should return the book to the library by Friday.
你要在星期五以前把這本書還給圖書館。

My mom told me that when someone helped me, I also had to return the favor.
我媽告訴我，當有人幫助我時，我也必須回報。

No one knows the date of Owen’s return from France.
沒人知道歐文從法國回來的日期。

All the old man wanted was the safe return of his expensive violin.
那老人只想要他那昂貴的小提琴平安歸來。

I gave Martin a watch in return for his help.
我給馬丁一隻手錶以回報他的幫忙。

On Mandy’s birthday, Tom wished her many happy returns.
在曼蒂生日當天，湯姆祝她長命百歲。

Daisy had to return the broken camera to the online store.
黛西必須將這臺壞掉的相機退貨給網路商店。

I love to exchange stamps with my friends.
我喜歡和朋友交換郵票。

Peter exchanged his toy car for a toy gun.
彼得用玩具車換了一把玩具槍。

I gave Allen a pen in exchange for his watch.
我用一支筆和艾倫換一只手錶。

Taking drugs does damage to one’s body and mind.
吸毒有害身心。

Taking drugs does harm to one’s body and mind.
吸毒有害身心。

The car was totally damaged in a traffic accident.
這輛車在一起交通事故中全毀了。

I purchased some face masks and hand sanitizer at the store.
我在店裡買了些口罩和乾洗手。

I made a purchase of some face masks and hand sanitizer at the store.
我在店裡買了些口罩和乾洗手。

I bought some face masks and hand sanitizer at the store.
我在店裡買了些口罩和乾洗手。

You need proof of purchase to claim a refund.
你需要購買證明才能要求退款。

I am sorry, but your deposit is non-refundable.
抱歉，您的定金無法退還。

The child’s deformity was caused by a genetic defect.
這孩子的畸形與基因缺陷有關。
 

 Sarah found a defect in the bag she just bought, 
so she took it back to the store and asked for a 
replacement. 
莎拉發現她新買的包包有瑕疵，所以拿回店裡去要求換貨。

 Many people defected from the Soviet Union to the 
West in the 1960s. 
1960 年代，許多人從蘇聯叛逃到西方國家去。

You seem to have endless problems with this car. Is it still under warranty? 
你這輛車似乎有沒完沒了的問題。它還在保固期內嗎？

I’ll do the cooking; meanwhile, you can do the laundry for me.
我來煮飯；在此同時你可幫我洗衣服。

I’ll do the cooking; in the meanwhile, you can do the laundry for me.
我來煮飯；在此同時你可幫我洗衣服。

When you pay the bill, don’t forget to ask for a receipt.
你付錢時，別忘了要發票。

Unfortunately, the cartridges that were delivered were defective.
遺憾的是，送來的墨水夾有瑕疵。

The company has recalled their defective products.
這家公司已經回收有缺陷的產品。