社交媒体上的呼吁迅速激活了志愿者们的响应。

The social media appeal quickly ___activated the volunteers' response.

按下这个按钮可以激活咖啡机。

Press this button to ___activate the coffee maker.

这种化学物质需要被激活才能产生反应。

This chemical needs to be ___activated before it can react.

老师有趣的教学方式让学生们都活跃了起来。

The teacher's engaging method ___activated all the students.