Module 3 主要与环保和节能相关。其中有很多表述环保概念和措施的单词，例如 conservation, ecology, emission, recycle, sustainable 等。同时也有一些具体的环境问题，例如 climate change, deforestation, pollution 等。学会这些单词不仅可以帮助我们更好地理解这个模块的内容，也能够引起我们对环保和节能等问题的关注和重视。
In today's digital age, technology has made it easier to track and predict periodic events. Calendars, reminders, and scheduling apps allow us to keep track of important dates and appointments. Smart devices can monitor and adjust to daily and seasonal changes, such as adjusting the temperature in a home based on the time of day or year. In addition, technology has allowed scientists to better understand and study periodic phenomena, such as using telescopes to observe the orbits of celestial bodies. However, as technology has made it easier to track and predict periodic events, it is important to remember the value of spontaneity and flexibility in our lives.