Steppingstone
n. 踏脚石，达到目的的手段
🗣️ 情景例句
What is your favorite sport?
你最喜欢的运动是什么？
I'm very much obliged to you.
非常感谢您。
because the environment that determines our evolution is no longer essentially physical.
因为决定我们进化环境的主要方面已不再是物质。