He could have taken a spare key.
他原本可以带上一把备用钥匙的。
We can't lend you a spare key.
我们不能借给你备用钥匙。
我可以再配一枚备用钥匙吗？
请借我备用钥匙。
你有备用的钥匙吗？
I always keep a spare key in the office.
我总是在办公室里放一把备用的钥匙。
They found a spare key and made a duplicate.
他们找到了一把备用钥匙，就又配了一把。
tip:Do not keep a spare key over the door or under the door mat.
小贴士：不要在门上或者门垫下面留备用钥匙。
My wife has the spare key, so I 'll have to go home by taxi.
我的妻子带着备用的钥匙，所以我得坐出租汽车回家。
My room door is locked on the inside, so I need your spare key to open it.
我的房门被反锁了，需要你的备份钥匙来开门。
Using the spare key that he carried, he unlocked the front door and entered the house.
他用备用的钥匙打开前门进了屋。
Cu : I just came back. I found I left my keys in my room this morning. Do you have a spare key?
我刚从外面回来，这才发现我今早把钥匙遗忘在房里，你有备用钥匙吗？
Never leave a spare key in a hiding place like under a door-mat, in a flower pot or inside the letter box--a thief will look there first.
不要把你的备用钥匙藏在你认为安全的地方，比如门垫下面，花盆里或信箱中，那些都是小偷首先会搜查的地方。
I've lost my key and I haven't got a spare.
我把钥匙丢了，还没有备用的。
Give me the boot key and I'll get the spare.
给我行李箱钥匙，我去配一把备用。
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。
3 spare AN/AAR-222 SINCGARS and Key Gen (KV-10) Systems
3套备用AN/AAR-222SINCGARS和密钥生成（KV-10）系统；
I will spare you the long story and just give you the key info that you will hopefully find useful.
我不会用我冗长的故事浪费你的时间，我只会告诉你必要的信息，希望你会觉得有益处。
Many domestic parts enterprises are very low-key leaders often, but foreign automobile spare parts business opposite.
很多国内的零部件企业领导者往往都非常低调，但国外汽车零部件商则相反。
But the genetic carrier is key point to gene therapy, consequently many researchers spare no effort to find more safe, high performance and stable genetic carrier.
而载体的选择是基因治疗的关键，所以研究者们不遗余力的寻找安全、高效、稳定的基因载体。
Staff: Could you keep this key carefully, please? There's no spare.
员工：请您留心保管这把钥匙，因为只有一把，没有备用的。
Give me the trunk key and I'll get the spare.
把行李箱的钥匙给我，我去拿一下备胎。
To analyze key spare parts by utilizing finite element theory improved design scheme and develop the design reliability.
应用有限元分析理论对关键零部件进行了分析，提出了改进的方案，提高了设计的可靠性。
To analyze key spare parts by utilizing finite element theory improved design scheme and develop the design reliability.
应用有限元分析理论对关键零部件进行了分析，提出了改进的方案，提高了设计的可靠性。
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