石油开采的创新不是可选项,而是满足世界能源需求的必要条件。
艺术规则并非武断;它们建立在理性和事物的本质之上。
Technology should serve the farmer, not complicate their work.
Every line you draw should have a purpose, even if it's just to make someone smile.
每一个超限的一致多重性,即每一个超限集合,必须有一个确定的阿列夫作为其基数。