at a snails pace 非常慢；（像蜗牛一样）慢吞吞地 They did the project at a snails pace and only half of it finished when the dead line came. 他们的工程做得很慢，截止日期到了，但是只完成了一半。
at a snail's pace
非常慢；（像蜗牛一样）慢吞吞地
They did the project at a snail's pace and only half of it finished when the dead line came.
