principally, + [sentence]
用于句首，强调主要观点。
Principally, the company focuses on renewable energy.
主要地，该公司专注于可再生能源。
主要地, 大部分
首要地；关于事情的主要方面。；主要地；大部分
for the most part
首要地；关于事情的主要方面。
In a primary manner; pertaining to the principal of a matter.
The company's success is principally due to its innovative products.
公司的成功主要归功于其创新产品。
用法提示：principally 作为副词，修饰整个介词短语“due to”，表示“主要地”。
She is principally responsible for managing the team.
她主要负责管理团队。
用法提示：principally 修饰形容词“responsible”，强调主要责任。
The course focuses principally on practical skills rather than theory.
课程主要侧重于实践技能而非理论。
用法提示：principally 修饰动词“focuses”，表示主要关注点。
用于句首，强调主要观点。
Principally, the company focuses on renewable energy.
主要地，该公司专注于可再生能源。
The delay was principally due to bad weather.
延误主要是由恶劣天气造成的。
修饰动词，表示主要行为或状态。
They are principally concerned with safety.
他们主要关心安全。
与principally基本可互换，是最常见的同义词。
强调优先或重要性，而非单纯比例。
较正式，多用于书面语。
强调数量或比例，比principally更口语化。
侧重程度而非核心性。
grammar · medium
易错句子He is principal responsible for the project.
正确表达He is principally responsible for the project.
形容词'principal'不能修饰形容词'responsible'；需要副词'principally'来修饰，表示'主要地'。
grammar · medium
易错句子Principle, we should focus on quality.
正确表达Principally, we should focus on quality.
'Principle'是名词，不能用作状语；应使用副词'principally'放在句首，表示'主要地'。
与主要地相对，表示重要性较低
mainly 侧重数量或程度上的主要，principally 侧重重要性上的首要
primarily 强调第一位或最初，principally 强调首要性
mostly 强调大部分情况或数量，principally 强调主要因素
主要关心
The committee is principally concerned with budget issues.
委员会主要关心预算问题。
主要负责
She is principally responsible for the project's success.
她主要负责该项目的成功。
主要由于
The delay was principally due to bad weather.
延误主要是由于恶劣天气。
主要是为了
The building is used principally for research purposes.
这座建筑主要用于研究目的。
Dictionary facts from ECDICT, OCTANOVE, WIKTIONARY.