Don't wait until everything is just right. It will never be perfect. There will always be challenges, obstacles and less than perfect conditions. So what. Get started now. With each step you take, you will grow stronger and stronger, more and more skilled, more and more self-confident and more and more successful.
数学的本质在于它的自由。
Every building must tell a story, the story of the people who inhabit it.
渔业技术的创新可以帮助我们在不耗尽海洋资源的情况下获取其丰富的物产。