质量是企业的生命线，我们始终坚持高标准、严要求，确保每一块石材都经得起时间的考验。
Quality is the lifeline of the enterprise. We always adhere to high standards and strict requirements to ensure that every piece of stone can stand the test of time.
The arithmetic of modular forms is a key to understanding the deeper structures of number theory.
热机的动力与实现它的工质无关；其量仅由最终实现热量转移的物体之间的温度决定。