1. It takes much less energy to accelerate to that 1.5 miles per second than it does on Earth.
    在月球上加速到每秒1.5英里比在地球上所用能源要少得多。

2. Human activities can cause or accelerate permanent changes in natural systems.
    而人类活动能够引起或加速自然体系中的永久性变化。