这时一辆汽车在人行横道前停下来等我们通过，郑女士做了一个对比：国内的司机会想，“我不能停下来，不然我哪儿都去不了了，”她说到。
A car paused for us at a crosswalk, and Zheng drew a contrast: Drivers at home think, “I can’t pause. Otherwise, I’ll never get anywhere, ” she said.
这是一个太空望远镜，能够观察由行星在主星(恒星)前横移造成的最微弱的亮度变化。如果允许我们探测类似地球的行星，那么需要达到该亮度变化的十万分之一。
It's a space-borne telescope that will be able to measure the tiniest dimming (caused by a planet crossing in front of the host star), to one part in 100,000, allowing us to detect Earth-like planets.
如果未划停车线，在人行横道前停车，不管人行横道有没有划线。
If there is no stop line, stop at the crosswalk, marked or not.
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