The nervous system is a dynamic, ever-changing system.
神经系统是一个动态的、不断变化的系统。
正直不会遭遇祸患,谦和不会损害道义。
今天我们种下的每棵树都是对未来清洁空气和健康生态系统的投资。
"You don't have to be a genius to understand the universe. You just have to be curious."