投资信托是一种集合投资工具，通过集合投资者的资金购买、经营和管理多种资产来实现投资目标。投资信托通常由专业的投资管理公司或信托公司发起，通过发行信托基金或证券的方式，吸引投资者参与。

投资信托的主要目的是为投资者提供一种低风险、稳定收益的投资方式。通过投资信托，投资者可以获得多样化的投资组合，分散风险，同时也可以享受到专业的管理和运作带来的收益。

投资信托的主要运作方式是通过集合投资者的资金，由专业的投资管理公司进行管理和运作。这些投资管理公司通常拥有丰富的投资经验和专业知识，能够根据市场情况和投资者的需求制定合适的投资策略和方案。

投资信托的种类繁多，根据不同的分类标准可以分为不同的类型。例如，根据投资标的的不同，可以分为股票型、债券型、混合型等；根据投资地域的不同，可以分为国内投资信托和海外投资信托；根据投资策略的不同，可以分为积极管理型和被动管理型等。

总的来说，投资信托是一种集合投资工具，通过集合投资者的资金进行多样化的资产配置和管理，为投资者提供一种低风险、稳定收益的投资方式。投资信托的种类繁多，投资者可以根据自己的需求选择适合自己的投资信托产品。同时，投资者也需要注意风险控制和资产配置等方面的问题，避免盲目追求高收益而忽略风险。

英文中对于投资信托的描述如下： Investment trusts are collective investment vehicles that purchase, manage, and operate multiple assets by pooling together investors' funds. Typically initiated by professional investment management companies or trust companies, investment trusts attract investors by issuing trust funds or securities.

The main purpose of investment trusts is to provide investors with a low-risk, stable-income investment option. Through investment trusts, investors can obtain diversified investment portfolios, diversify risks, and enjoy the benefits of professional management and operation.

The main operation of investment trusts is to pool investors' funds and manage and operate them through professional investment management companies. These investment management companies usually have rich investment experience and professional knowledge, and can formulate appropriate investment strategies and plans based on market conditions and investor needs.

There are various types of investment trusts, which can be classified into different types according to different classification criteria. For example, according to the investment targets, they can be divided into stock type, bond type, mixed type, etc.; according to the investment geography, they can be divided into domestic investment trusts and overseas investment trusts; according to the investment strategy, they can be divided into active management type and passive management type, etc.

In summary, investment trusts are collective investment vehicles that provide investors with a low-risk, stable-income investment option by pooling together investors' funds for diversified asset allocation and management. There are various types of investment trusts, and investors can choose suitable investment trust products according to their own needs. At the same time, investors also need to pay attention to risk control and asset allocation and other aspects to avoid blindly pursuing high yields while ignoring risks.