n.开（驱，起，启）动；触发，活化（作用）；活性（化）；激活；使…产生放射性；敏化

The activation of the immune system is crucial for fighting off infections.
免疫系统的激活对于抵抗感染至关重要。
This button needs to be activated before the machine can start operating.
这个按钮需要先被激活，机器才能开始运行。
The software requires an activation code to unlock its full features.
该软件需要一个激活码来解锁全部功能。
The new credit card will only become active after you've signed it.
新的信用卡在签名后才会生效。
The chemical reaction won't occur without the presence of a catalyst for activation.
没有催化剂的激活，化学反应不会发生。
The exercise routine helps activate muscles that are often dormant in daily life.
这套运动能激活日常生活中常处于休眠状态的肌肉。
The therapist used deep tissue massage to activate the patient's healing process.
理疗师通过深层组织按摩来激活患者的愈合过程。
The marketing campaign was designed to activate customer engagement with the brand.
这次营销活动旨在激发顾客对品牌的参与度。
The solar panel starts producing electricity once it's activated by sunlight.
太阳能板一旦被阳光激活就会开始发电。
The app sends a push notification to activate users who haven't logged in for a while.
这个应用会发送推送通知以激活一段时间未登录的用户。