Second, setting the trigger option (once or always) is different for both versions.

其次，两个版本设置的触发器选项（一次或总是）不同。

youdao

Note that the trigger option controls whether what has been selected by the other trace properties is produced as normal or whether it is blocked.

注意，触发选项控制其他跟踪属性已经选择的跟踪数据是正常生成，还是被阻塞。

youdao

Snowe first proposed the so-called "trigger" idea for a public option months ago, and has talked to Obama about it on several occasions, according to a source familiar with the discussions.

CNN: Sources: Obama, GOP's Snowe work on health care compromise

But if those changes failed to occur within the defined period, a so-called "trigger" would provide for creating a public option to force change on the insurance companies, the source said.

CNN: President to focus on health care specifics, Biden says

The new system update also enables game developers to set up trigger points in their games that provide PS3 system users the option to quickly and easily publish game related information from their favorite titles to Facebook.

ENGADGET: PS3 firmware 3.10 released with Facebook support, 'richer' trolling experience