slip away

动词 slip away:

1. leave furtively and stealthily
   同义词：steal away, sneak away, sneak off, sneak out
2. pass by
   同义词：elapse, lapse, pass, slip by, glide by, go by, slide by, go along

1. Moon's weak gravity let the gasses slip away into space.
   月球的微弱引力允许气体逃到太空里去。
2. Aha, you can't slip away this time.
   哈哈，这回你溜不掉了。
3. I saw the boy slip away through the door.
   我看见那个男孩溜出门去。