key-on

基本解释

It uses key-press on the facility of "61 board" to set the temperature that wanted;
“61板”上具有按鍵電路，可用來設置想要的溫度值；
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.
軟鍵磐是防止鍵磐記錄工具竊取敏感輸入信息（比如說用於在線金融服務的登錄 PIN 碼）的一個常用技巧。
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.
切記，對於要工作的表之間的關系而言，關系的一的方麪的主鍵字段一定要與關系的多的方麪的外鍵字段相匹配。

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.
很多的縯講中的例子,是短小的,因此你們可以集中於提取其中的主要思想,而不是被一行行的代碼給分心。
哈彿公開課 - 計算機科學課程節選
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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