- bumpy ride
- 颠簸: jolt; bump; toss; thrashing
- 振动: vibrate; vibration; vibrance ...
- 的: 4次方是 The fourth power of 2 i ...
- 运行: move; be in motion; run; wor ...
- 振动的: oscillating; oscillatory; singy; vibratile; vibrating; vibrational; vibrative; vibratory
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