active

At ninety years old, she is still very active and goes for a walk every morning.

(Chinese) 虽然九十岁了，她依然非常活跃，每天早上都会去散步。

Mount Etna is one of the world's most active volcanoes, erupting frequently.

(Chinese) 埃特纳火山是世界上最活跃的火山之一，经常喷发。

In the active sentence 'The cat chased the mouse,' the cat is doing the action.

(Chinese) 在主动句“猫追老鼠”中，猫是动作的执行者。

Teachers often encourage students to write in the active voice to make their prose clearer.

(Chinese) 老师经常鼓励学生使用主动语态写作，以使文章更清晰。