朋友们好！请问一下学习普通话的外国朋友们，你们在学习和运用普通话词汇的时候都遇到过什么难题和不解的地方呢？可不可以交流分享一下？

dear friends, are you learning chinese? would you mind sharing your learning experiences with us about the mistakes ,or even jokes you made, maybe for the cultural differences between different countries? Thank you~