英式:[ˈtʃiːfli]美式:[ˈtʃiːfli]
adv.主要地
用作副词 (adv.)
Air consists chiefly of nitrogen. 空气主要由氮气组成。
Chiefly, I asked you to remember to write to your dear mother. 我主要是想提醒你写信给你母亲。