2. Slogan of China Shenzhen Special Economic Zone: Time is money and efficiency is life.

Americans have a famous saying: The best time to plant a tree was 20 years ago, and the second best time is now.

4. Pay attention to time statistics. For 56 years, the Soviet entomologist Lyubyshev recorded every minute of daily activities. A paper on the application prospect of mathematics in biology takes "43 hours and 45 minutes". I have made great achievements in my life, including more than 70 academic works alone.