therapeutic tool的用法和樣例：
例句
- It is an effective and reasonable therapeutic tool to transplant the limbus corneae stem cells.
採取角膜緣幹細胞移植應是一種合理有效的治療手段。 - But if efforts to understand and master stem-cell development prove successful, doctors will have a therapeutic tool of incredible power.
但是如果理解和掌握幹細胞發育的努力證明是成功的，醫生就會得到能量之大令人難以置信的治療手段。
