I hope to always be number one, but maintaining this level is quite a challenge.
我希望自己永远是第一，但维持现在这样的高度确实是个蛮大的挑战。
You have to be true to yourself. Strong enough to be true to yourself. Brave enough to be strong enough to be true to yourself. Healthy enough to be brave enough to be strong enough to shape yourself from what you actually are.
自然和历史是地理知识的两个重要来源。
Science is the tool with which we unravel the mysteries of life.