If you're invited to an American friend's home for dinner, keep in mind these general rules for polite behavior.

如果您被邀请到美国朋友家吃晚饭，请记住这些礼貌行为的一般规则。

For example, what they wear and do, and what is considered to be polite behavior when people eat a meal.

例如，他们的穿着和行为，以及人们吃饭时被认为是礼貌的行为。

Difficult words: bless (to ask God to keep someone safe), plague (a dangerous disease which makes many people sick and kills many people), polite (good behavior with others).

困难的词语：祝福（祈求上帝保佑某人安全）、瘟疫（一种危险的疾病，使许多人生病并杀死许多人）、礼貌（与他人良好的行为）。