Ans:

Repair：修補之意、通常用在將實體物件回復成原有狀態，或回到可用的狀態。

Fix：修理之意、可用在實體物件或抽象物件(概念)，並非回復狀態、而是消除
錯誤的狀況。而消除方式可能是回復原態、使用替代品、或甚帶有改進意味的將
物品變得更為好用。

另外加入Mend這個字，綴補之意、實體或抽象的…

底下是相關閱讀裡提到的例句，可略明一二…
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Sentences with Mend:
1. My mom is going to mend my shirt.
2. Erica and Andrew are trying to mend their relationship.
3. Evelyn is mending her broken heart.

Sentences with Repair:
1. Ellen got her computer repaired. The screen was broken.
2. I am taking my car in for repairs. It doesn’t seem to be working right.
3. We need to repair the leaking pipe in the basement.

Sentences with Fix:
1. He is trying to fix the broken lamp.
2. Grandpa fixed the broken window last night.
3. My mom fixed the hole in my sock.
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相關閱讀：Mend, Repair or Fix?