chiefly
单词辨析：
指范围或程度上占大半地。
This small country is largely located in the desert.
这个小国家大部分地区位于沙漠中。
Her success was largely due to luck.
她的成功主要靠运气。
指作为非常重要的成分但并非全部地。
Air consists chiefly of nitrogen.
空气主要由氮气组成。
Cattle feed chiefly on grass.
牛主要以草为食。
主要用于强化程度，不修饰形容词，通常用于动词或分词前。
the greatly increased risk
大大增加的风险
He was greatly hurt.
他深受伤害。
I was greatly moved by his kindness.
他的善良令我极为感动。
指数量等方面占多半。
The members of the party are mostly workers.
该党的成员大部分为工人。
The men at the party were mostly fairly young.
参加聚会的男子大都非常年轻。
We mostly go out on Saturdays.
我们星期六一般不在家。
相关例句：
Chiefly deciduous shrubs or small trees of Mediterranean area and western Asia: broom.
主要在地中海地区和西亚的每年落叶的灌木或小乔木；金雀花。
A man's success depends chiefly on himself.
一个人的成功主要靠自已。
The so-called "lead" in a pencil is not lead at all, but chiefly a different form of carbon called graphite.
铅笔中所谓的铅，并不是“铅”，而主要是一种不同形态的炭，称为石墨。
We have forgotten the age-old fact that God speaks chiefly through dreams and visions.
我们已经遗忘这一古老的事实：上帝主要通过梦和幻觉来倾诉。
Chiefly a direction or description in music; very soft.
主要用于对乐曲的描写和说明；非常微弱的。
Their diet chiefly consists of grain and vegetables.
他们的饮食主要是谷类和蔬菜。