replacement reaction

例句：

1. 1. The replacement reaction ofthe new drug is still under investigation.
   新药的替代反应仍在调查中。
2. 2. Duringthe reaction, the metal atoms are replacedby other elements.
   在反应过程中，金属原子被其他元素替换。
3. 3. Thereplacement reaction has been studiedextensively in the field of organicchemistry.
   有机化学领域对替代反应进行了广泛研究。