active tooth eruption的用法和样例：
- In truth, both root development and the stimuli that initiate tooth eruption are complex and still little understood.
- Advanced research on tooth eruption mechanism
- An active volcano may erupt at any time.
- According to the principle of resistance power and driving power being equal in amounts, the key parameter, the greatest acting force acted on the active tooths by the revolving arm ball bearing of the shock wave instrument is resulted.