You can borrow my keys—I have a spare set.
你可以借用我的钥匙—我还有一套。
As it happens, I have a spare set of keys in my office.
碰巧我在办公室有一套备用钥匙。
Keep a spare set of keys on a special key ring that is just for guests.
为客人们专门准备一把特别的备用钥匙。
I had to call my husband, who drove an hour to bring me my spare set of keys.
我不得不给我丈夫打电话，他驱车一个小时给我送备用钥匙。
A spare set of headlight bulbs is a legal requirement.
法律规定必须随车携带备用的前照灯灯泡。
A spare set of headlight bulbs is a legal requirement.
法律规定必须随车携带备用的前照灯灯泡。
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