first,at first,firstly意思及用法等区别还有first of all

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first,at first,firstly意思及用法等区别
还有first of all

first是序数词,表示第一.At first 是一开始.例：At first,I felt terrible.Firstly是副词,是首先的意思.例：Firstly,I'd like to introduce my family.First of all 与 firstly 类似,用于说明自己的第一观点（一般英语演讲中用）.

first first first first first first first “first First First first first first First First first first first of all first the first at first的区别

first,at first,firstly意思及用法 等 区别还有first of all

first,at first,firstly意思及用法等区别还有first of all