Don't give even number of flowers as a gift. That's for dead folks. Proper bouquet will have 1/3/5/7/... flowers.
送礼时不要送偶数倍的鲜花，那是送给死人的，通常来说花束里花的数目是1/3/5/7之类的。
Don't criticize Soviet Union when talking with people over 40. They grew up at those times and might be nostalgic. Even if they enjoy modern life they might not like hearing foreigners talking about it.
在和年龄超过40岁的人聊天时不要批评苏联，他们成长于那个年代而且有可能是怀旧派。即使他们对现在的生活很满意，他们也不喜欢外国人谈论苏联。
