friendly、kind与cordial这些形容词均含“友好的、亲切的”之意。
friendly : 指举止像朋友一样，往往怀着满腔热情，乐意助人。
- a friendly face/smile
友好的面容／微笑 - Our neighbours have always been very friendlyto/towards us.
我们的邻居们一直对我们很友好。 - I'm on friendly terms with my daughter's teacher.
我和我女儿的老师关系处得很不错。 - Are you friendly with (= a friend of) Graham?
你跟格雷厄姆是朋友吗？
kind : 指考虑周到，体谅他人，乐于助人。
- She's a very kind and thoughtful person.
她是个非常宽容体贴的人。 - It's very kind of you to help us.
承蒙惠助，不胜感激。 - Please be kind to your sister!
请对你的妹妹好些！
cordial : 较正式用词，指亲切热诚，情意真挚。
- 诚挚的微笑／问候／欢迎／接待
a cordial smile/greeting/welcome/reception - 亲切友好的气氛 / 会议 / 关系
a cordial atmosphere/meeting/relationship - 据说两位领导人关系友好。
Relations between the two leaders are said to be cordial.
（拓展学习：小词详解 | cordial）
