In fact, OpenBSD is so secure that it was once banned for use in a DEF CON competition, where crackers go after each other's systems.

事实上，OpenBSD是如此的安全，以至于在DEF CON竞赛中曾一度禁止使用它，在这个竞赛中，破解高手们对所有其他的系统进行攻击。

youdao

Python variable names are case-sensitive, and you can't use certain Python keywords (such as if, else, while, def, or, and, not, in, and is, for starters) as variable names.

Python 变量名是区分大小写的，并且您不能使用特定的 Python 关键字（比如 if、else、while、def、or、and、not、in 和 is 开始符）作为变量名。

youdao

The second method is to use a module-definition (.def) file.

第二种方法是使用一个模块-定义(. def)文件。

youdao

The Slingbox PRO is their new flagship model, with additional inputs and outputs so you can control up to four audio or video sources (sadly, if you want to use high-def component inputs you need to drop an extra fifty bucks on a dongle they're calling the HD Connect -- there is no option for HDMI).

ENGADGET: Slingbox PRO, Slingbox AV, and Slingbox Tuner get official

Our goal is to use the high-def signal that they are broadcasting on Channel 10.1 to pull in ABCs HD signal.

ENGADGET: What if your cable provider doesn't have ABC in high-def? HD

As small as a BlackBerry, as light as a pack of cigarettes and as complicated to use as eating a banana, the Flip shoots hi-def video that rivals cameras costing many thousands.

FORBES: The Incredibly Uneven Recovery