The truck started going backward, and building up speed on the way down.
那辆货车开始慢慢地往山下后退，并在溜坡的过程中速度越来越快。
Is the world we live in going forward or backward?
我们生活的这个世界是在进步还是在退步？
Going forward, can you avoid booking me the backward-facing seat?
今后你能不要再帮我订后向座了吗？
Going forward, can you avoid booking me the backward-facing seat?
今后你能不要再帮我订后向座了吗？
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