on key

基本解释

Telnet with Kerberos can use only Kerberos, which is based on secret-key technology.
用 Kerberos 的 Telnet 仅可以使用 Kerberos，Kerberos 是基于密钥技术的。
BOINC protects against several types of attacks. For example, digital signatures based on public-key encryption protect against the distribution of viruses.
BOINC能防止各种类型的攻击。例如，使用基于公共钥匙加密技术的数字签名来防范病毒传播。
The SSL protocol is based on public-key cryptography where encryption keys come in pairs that are mathematically related, but one cannot be deduced from knowing the other.
SSL 协议基于公钥密码，加密密钥成对地出现在公钥密码中，它们是在数学上是相关的，但无法由一个推知另一个。

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
So if you've ever seen or used an old school typewriter, you might recall that when you're typing something out on an old mechanical typewriter, - when you like hit the char-- when you hit the enter key to move the head back to the left hand side to the next line or you would pull down some lever, it was really a two part process.
如果你们有谁曾经看过或用过老式打字机，可能还记得，当你在,这种老式打字机上打字的时候，当你-,敲入回车键，跳转到,下一行的最左边，或者,拉一下杆，这个需要两步走。
哈佛公开课 - 计算机科学课程节选

Most importantly though, one should find pragmatic solutions to solve the recurrent norms dispute the EU and the US have frequently had (i.e. on low-key issues such as beef hormones).
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