I didn't discover until the end of my run that my car key (yes, the expensive one with the unlock/lock buttons) had fallen out.

直到跑到最后我才发现我的车钥匙（是的，有解锁和锁最贵的那把钥匙）掉了。

youdao

So you only have to remember one single master password or select the key file to unlock the whole database.

所以你只需要记住一个单一的主密码或选择密钥文件解开整个数据库。

youdao

Riders use an electronic key to unlock a bike from one of more than 300 stations.

VOA: standard.2010.07.30

The Ascend G 330 runs Android's Ice Cream Sandwich operating system, and incorporates Huawei's own HAP 5.1 Android interface, which enables easy one-step access to key features from the unlock screen, including call, messaging and camera functions.

ENGADGET: Huawei Ascend G 330 lands on UK shores through TalkTalk

It would use public key cryptography to generate and store thousands of public and private key pairs, one for every app or gadget the user needs to unlock.

FORBES: Could A Crypto-Computer In Your Pocket Replace All Passwords?