如果时空穿梭是可能的,那从未来穿越回来的旅客在哪里呢?
If time travel is possible, where are the tourists from the future?
衡量矿业公司成功的真正标准是其如何平衡利润与环境责任。
The most important single aspect of software development is to be clear about what you are trying to build.