1、At the event horizon, the escape velocity is equal to the speed of light.
在活動視界里，逃逸速度等于光速。

2、The gravitational field is so strong that the escape velocity near it exceeds the speed of light.
重力場是如此的強(qiáng)大以致于靠近它的逃逸速度超過光速。

3、A spaceship that reaches escape velocity is moving fast enough to break free of a planet's gravity.
太空船之所以能飛出地球，是因為其飛行速度很快，足以掙脫地球的引力。

escape velocity翻譯