1
used for talking about the largest or most important part of something 大部分地；主要地 This sauce is made mainly of milk and flour. 这种沙司主要是用牛奶和面粉做的。
mainly because :
I didn't come mainly because I didn't feel very well. 我没来主要是因为感觉不舒服。
Synonyms and related words
Mainly: mainly, largely, mostly...
Synonyms and related words
Words used for saying that something is important: essentially, importantly, basically...