The electronic key card to Julie's room would not work.

朱莉房间的门卡不能用了。

《柯林斯英汉双解大词典》

Choose hotels that have electronic key systems where the rooms are re-keyed after guests check out.

选择有电子钥匙系统的旅馆，这种旅馆在客人结帐离开后，房间会重设密码。

youdao

Enhanced DS2401 silicon serial number is a low-cost electronic key, the code applied to the use of the components.

说明：ds2401增强型硅序列号是一款低成本的电子注册码，本代码应用了该元件的使用。

youdao

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

VOA: standard.2010.07.30

The thesis of 3.091, and this is where the chemistry comes in, is that electronic structure of the elements holds the key to the understanding, not just the chemical bonding, but the long range atomic order.

这是这门课的论点，这是化学的研究点，也就是元素的电子结构,那即是理解的关键，不只是化学键，还有长程的原子排序。

麻省理工公开课 - 固态化学导论课程节选

The HAPIfork contains an electronic key with a printed circuit that links the extremity and the handle of the fork.

ENGADGET: HAPILABS introduces HAPIfork (and spoon) smart utensils, brings metrics to your mouthfuls (hands-on)

This second ID could be a small piece of hardware, such as an electronic key fob, or a biometric (see the next paragraph).

FORBES: Security's Fab Five

Electronic key records show Ms Diallo entered the presidential suite in which Mr Strauss-Kahn was staying between 12:06 and 12:07, while phone records show that he was speaking to his daughter Camille by 12:13, the article says.

BBC: Strauss-Kahn 'suspected phone was hacked'