But he hasn 't campaigned for the job and has indicated he may back out by next week .
但他没有为自己拉过票，并曾暗示可能会在下周之前退出。
As the two men entered bearing two gurneys a woman walked back out .
两名男子推着轮床进去时，一个女人走了出来。
It was so big that a tug boat was unable to pull it back out to sea .
它是在是非常大，以至于一艘拖船不能把它拉回到大海中。
This is your last chance to back out .
这是你最后一次打退堂鼓的机会。
When you have fallen so far it is a long way back out .
当你陷入现在这样的深渊后，爬回去的路会很长。
Some types such as marine stratocumulus clouds can have a significant cooling effect thanks to their ability to reflect sunlight back out to space before it ever reaches the surface of the planet .