1. But the virtual platform breaks the boundaries of time and space, meaning visitors can see whatever they want. 但是这个虚拟平台就可以打破时间和空间的限制，游客想看什么都能看到。
2. The difference in refractive index between organelles and the surrounding cytoplasm causes the boundaries between organelles and cytoplasm to reflect more light. 细胞器和周围细胞质的折射指数不同导致了细胞器和细胞质的边界能够反射较多的光线。
3. In its broadest sense, power quality is a set of boundaries that allows electrical systems to function in their intended manner without significant loss of performance or life. 从最广泛的意义上说，电能质量是一套电力系统允许在其预定的方式下运行的性能或没有重大生命损失的界定。
