HSK 6
轨道
guǐdào名
track (for trains etc); orbit (of a satellite); (fig.) a person's established path in life; desired trajectory (of a business or other endeavor)
火车沿着轨道缓慢前进。
Huǒ chē yán zhe guǐ dào huǎn màn qián jìn.
The train moved slowly along the track.
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New in the HSK 3.0 word list at level 6.