我们的朋友简下周一就要飞回美国了。
我记得当时给一位在美国的朋友打电话，称我们有了新发现。
I remember telephoning a friend in the US to say that I thought we had a new discovery.
最后请美国朋友告诉我们，我们在口语中感到困难的那些句子，他们是怎样表达的,并且要一直模仿他们。
Finally, have American friends tell us how they say things we have trouble with, and always imitate them.
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