mainly

1. ADV 主要地;大部分地
   You use mainly when mentioning the main reason or thing involved in something.
   1. The stock-market scandal is refusing to go away, mainly because there's still no consensus over how it should be dealt with...
      股票市场的丑闻迟迟没有消散，这主要是因为人们仍未就如何应对它达成共识。
   2. The birds live mainly on nectar.
      这些鸟主要以花蜜为食。
2. ADV 主要地；大多数地
   You use mainly when you are referring to a group and stating something that is true of most of it.
   1. The African half of the audience was mainly from Senegal or Mali...
      观众中有一半是非洲人，其中大多数来自塞内加尔或马里。
   2. The spacious main bedroom is mainly blue.
      宽敞的主卧室以蓝色为主色调。

adv.

1. 主要地；首要地
   more than anything else; also used to talk about the most important reason for sth
   1. They eat mainly fruit and nuts.
      他们主要吃水果和坚果。
   2. ‘Where do you export to?’ ‘France, mainly.’
      “你们出口到哪里？”“主要是法国。”
   3. The population almost doubles in summer, mainly because of the jazz festival.
      主要由于爵士音乐节的缘故，在夏季这里的人口几乎比平时多一倍。
2. 大部分；大多
   used to talk about the largest part of a group of people or things
   1. The people in the hotel were mainly foreign tourists.
      酒店里住的大多是外国游客。