Time Restriction短语⁷¹⁵⁰⁰ 基本例句 时间约束 Using VRL in education can break through the space- time restriction of traditional experiment, reduce the experimental outlay, and evade the dangerous operation in traditional experiment. 虚拟实验室应用于实际教学具有“突破传统教学实验的时空局限性”、“减少实验经费开支”、“规避传统实验的危险操作”等等优点。 cnki