mainly, chiefly, greatly, largely, mostly, primarily, principally, generally

副詞 primarily:

1. for the most part
   同義詞：chiefly, principally, mainly, in the main
2. of primary import
   同義詞：in the first place

1. A borough of northeast New Jersey north-northeast of Paterson. It is primarily residential with varied light industries. Population, 17,084.
   霍索恩美國新澤西州東北部一自治村鎮(zhèn)，位于帕特森東北偏北。主要為住宅區(qū)，有多種輕工業(yè)。人口17, 084
2. Most linguists would say they were concerned primarily with the structure of languages.
   大多數語言學家都會說，他們主要研究各種語言的結構。
3. This building was primarily intended to be a dinning hall.
   這座建筑原來是打算用作餐廳的。

pri.mar.i.ly

adv.（副詞）
Chiefly; mainly:
主要的；根本的：
例句：
a scholastic program primarily for seniors; a primarily middle-class neighborhood.
主要為高年級學生開設的教育課程；主要居民為中產階級的居住區(qū)

At first; originally.
開始；起初，最初