key-on

基本解释

It uses key-press on the facility of "61 board" to set the temperature that wanted;
“61板”上具有按键电路，可用来设置想要的温度值；
Soft keypads are becoming a common technique to prevent key-logger attacks on sensitive input, such as the login PIN code for online banking services.
软键盘是防止键盘记录工具窃取敏感输入信息（比如说用于在线金融服务的登录 PIN 码）的一个常用技巧。
Remember that for relationships between tables to work, the primary-key field on the one side of the relationship must match up to the foreign-key field on the many side of the relationship.
切记，对于要工作的表之间的关系而言，关系的一的方面的主键字段一定要与关系的多的方面的外键字段相匹配。

The general referred to that goal at a low-key ceremony during which he formally took on his new duties Monday in Kabul.
It's deliberate that a lot of the examples in lecture are fairly short and bite-size so that you can actually focus on pulling out the key ideas without getting distracted by line and lines of code.
很多的演讲中的例子,是短小的,因此你们可以集中于提取其中的主要思想,而不是被一行行的代码给分心。
哈佛公开课 - 计算机科学课程节选
But that goodwill will be tested during three key summits Mr.Obama will be attending in London, on the French-German border, and in Prague.

They agreed years ago to help support — with their tax dollars and land — a statewide, throw-away-the-key, tough-on-crime mentality.
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