种树的最佳时间是20年前,其次是现在。
The best time to plant a tree was 20 years ago. The second best time is now.
In the landscape of string theory, there are perhaps 10^500 different vacuum states, each corresponding to a different possible universe.
The value of drones lies not in flying, but in implementation.
The future of food depends on balancing tradition with innovation.
处于困境中的人往往只关注自己的问题,而解决问题的途径通常在于你如何解决别人的问题。