一、两个词或者短语或者句子的情况： 词1 and 词2 短语1 and 短语2 句子1 and 句子2（或者句子1, and 句子2）
二、三个或者三个以上词、短语或者句子的情况：（比如四个） 词1, 词2, 词3, and 词4 短语1, 短语2, 短语3, and 短语4 句子1, 句子2, 句子3, and 句子4
有一个特例：
The hognose snake puts on an impressivebluff, hissing and rearing back,
broadeningthe flesh behind its head the way a cobra does and feigning repeated strikes,butit has no dangerous fangs and no venom, and eventually, if its pursuer is not cowed by theperformance, will fall over and play dead.
hissing and rearing back 和 broadening……and feigning repeated strikes两个短语中没有加and是为了避免……and……，and……and……的混乱情况，所以当两者并列，有时候可将“，and”直接变成“，”