Rich: (In the market) Which light bulb do you think is better?
Belle: I would say the energy efficient one.
Rich: Isn't it more expensive compared with the traditional one?
Belle: Yes, it is. But the extra cost can be easily recovered from the lower electricity bills.
Rich: Sounds great. So we can help ease global warming and save money at the same time.
Belle: That's right. We should keep climate change in mind and use more energy efficient appliances in order to ease global warming.

解析:keep (someone or something) in mind==remember and think about someone or something (謹記在心)

efficient adj. 有效的
appliance n. 應用;適用, 裝置;器具;用具
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