sure signal的意思|示意

It may not be a 100% sure thing, but it's definitely "on" if you see that eye signal.

可能不是100%肯定的事，但是如果你看到那个眼神信号确定没错。

If the bicyclist rides faster than the runner can go, and will be looping back to meet the runner, make sure the bicyclist knows how to signal properly and avoid turning into traffic.

如骑车者速度比跑步者快很多，将可能迂回后跟其汇合，确保骑车者知道如何向其示意，并避免发生意外。

If you are sure that signal generation in this window of time won't have any adverse effects, you can skip sigsuspend and go directly to resetting the signal.

如果您能确保在此时间窗口中生成的信号不会有任何负面影响，那么您可以忽略sigsuspend并直接重新设置信号。