keep space短语¹¹⁴⁴⁶⁷⁺⁴ 基本例句 🌏保持车距;保持空间;保持距离 上高速 Entering knowledge economy times, Maths has developed into a science which keep space with social science and natural science different from natural science. 进入知识经济时代,数学已发展成为独立于自然科学而与自然科学、社会科学并驾齐驱的一门科学。 cnki