向更清洁能源的过渡必须实用、经济且可靠。
When each day is the same as the next, it's because people fail to recognize the good things that happen in their lives every day that the sun rises.
The harder you work, the luckier you get.
Be frugal in all things， except in your passions splurge.
The rule, or measuring rod, which the behaviorist puts in front of him always is: Can I describe this bit of behavior I see in terms of "stimulus and response"?
Purchase the most recent tourist guidebook to your home town or region. You’ll learn a lot by playing the tourist once a year.