a dry run的用法和样例：
- He did a dry run of speech in front of a mirror.
- Let's do a dry run of the commercial again.
- It was a dry run to say the least.
- We're going to practice a dry run of the performance tonight.
- In fact, your good buddy JD did a dry run earlier, and I'll tell you how.
- Let's do/have a dry run.
a dry run的相关资料：