你必须保持冷静，待在那里直到震动停止。

You must keep calm and stay there until the shaking stops.

youdao

不论什么事发生，你必须保持冷静。

Whatever may happen, you must keep calm.

youdao

你必须保持冷静的来面对它。

And then, you have to keep calm and face it unhurriedly.

youdao

You have to remain celibate and, as we will see in the coming week, this is important to Milton. You have to remain sober, and you must eat vegetarian .

你必须独自生活，我们会在下周看到，这对弥尔顿很重要，你必须保持冷静，你还必须吃素。

耶鲁公开课 - 弥尔顿课程节选