A moral rule guiding behavior and choices.

• A standard you refuse to compromise.

指导行为与抉择的道德原则。

• 不愿妥协的准则。

A fundamental truth forming the basis of a system.

• A rule used to guide methods or solve problems.

构成体系基础的基本原理。

• 用于指导方法或解决问题的规则。

A general law describing how natural phenomena behave.

• A scientific rule, often named, tested, and widely accepted.

描述自然现象如何表现的一般规律。

• 常被命名并广泛接受的科学规则。

The active constituent characteristic of a plant or tissue.

• A component responsible for a substance’s specific effect.

某植物或组织中具有特征性的有效成分。

• 赋予物质特定作用的组成部分。