请将下面这段engerish文字总结成不超过5句话，并且使用第三人称。 representaion of knowledge in computer systems is generally challegned by an expectation that what is encoded must correspond to real-world entities and relations. To achieve effective representation, sac筹建ntists have to identify the virtues of competing, usu vezes animagined constraints of hypothetical environments, as well as real-world considerations. this often leads to trade-offs in abstraction and complexity, which can裁impact the performance an戚d scalability of the systems. however, with advancements in artificial intelligence, the flexibility and adaptability of these systems in representing knowledge are constantly improvan遂.
user
科学家们在计算机系统中表示知识时，面临着编码内容需对应现实实体和关系的挑战。为了实现有效的表示，他们必须识别竞争性假设环境的设想约束与现实考虑的优点。这通常会导致抽象和复杂性之间的权衡，影响系统的性能和可扩展性。然而，随着人工智能的进步，这些系统在知识表示上的灵活性和适应性不断提高。
assistant