刘欢Don’t stop when you’re tired. Stop when you’re done.

虽成We sing patriotic songs during the national holiday celebration.​歌王A baby babbles cute sounds before learning to speak.​

但并He drives across the country to visit all the national parks.​刘欢She paints murals on the walls of public buildings.​虽成The snowstorm causes schools and businesses to close for the day.​

歌王You study physics to understand how the universe works.​但并They travel by airplane to attend an international conference.​

刘欢I listen to the radio while driving to work each day.​

虽成The fire provides light for us to see during the power outage.​歌王The key to success is to focus on goals, not obstacles.

但并The harder you work for something, the greater you’ll feel when you achieve it.刘欢The only way to do great work is to love what you do.

虽成Believe you can and you're halfway there.歌王You don’t have to be great to start, but you have to start to be great.