To push behind the dog sled and run in front of the dog sled. That was always an interesting job.
把狗拉到雪橇后面，跑到雪橇前面。那一直是一份有趣的工作。
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Push
把狗拉到雪橇后面，跑到雪橇前面。那一直是一份有趣的工作。