中文：

企业投资主体是指具有投资决策权和资金支配权的法人或自然人，是企业投资行为的主体。企业投资主体的构成可以是多种多样的，包括股东、经营者、管理者、投资者等。

股东是企业投资主体的核心构成部分，是企业资产的所有者，具有最高的决策权和资金支配权。股东的投资行为一般以长期增值为目标，通过投资于企业的股权来获得投资收益。

经营者是企业投资主体的另一重要构成部分，是企业日常经营管理的执行者。经营者的主要职责是负责企业的日常经营管理，通过合理配置企业资源、调整产品结构、改善经营效率等方式来提高企业的盈利能力。

管理者是企业投资主体的重要组成部分，是企业各项管理活动的组织者和实施者。管理者的主要职责是制定企业各项管理政策、监督执行各项管理活动、提高企业管理水平等。

此外，企业投资者也是企业投资主体的构成部分，包括机构投资者和个人投资者等。投资者通过购买企业的股票或债券等有价证券来获得投资收益，对企业经营状况的关注程度相对较高。

总之，企业投资主体是企业投资行为的主体，其构成可以是多种多样的。不同的企业投资主体在投资行为中具有不同的职责和作用，共同构成了企业投资主体的完整体系。

英文：

The enterprise investment entity refers to the legal person or natural person with decision-making power and fund disposing power in the investment behavior of the enterprise. The composition of enterprise investment entities can be diverse, including shareholders, operators, managers, investors, etc.

Shareholders are the core component of the enterprise investment entity, representing the ownership of enterprise assets and having the highest decision-making power and fund disposing power. The investment behavior of shareholders is generally aimed at long-term value appreciation, obtaining investment returns by investing in the equity of the enterprise.

Operators are another important component of enterprise investment entities, responsible for the daily operation and management of enterprises. Their main responsibilities are to manage the daily operation and management of enterprises, improve the profitability of enterprises by optimizing resource allocation, adjusting product structures, improving management efficiency, etc.

Managers are also an important component of enterprise investment entities, responsible for organizing and implementing various management activities. Their main responsibilities are to formulate various management policies, supervise and implement various management activities, improve enterprise management levels, etc.

In addition, enterprise investors are also a component of enterprise investment entities, including institutional investors and individual investors. Investors obtain investment returns by purchasing securities such as stocks or bonds of enterprises, and pay more attention to the operational status of enterprises.

In general, the enterprise investment entity is the main body of enterprise investment behavior, which can be composed of many different components. Different enterprise investment entities have different responsibilities and roles in the investment behavior, forming a complete system of enterprise investment entities.