If time travel is possible, where are the tourists from the future?

不懈的努力不是力量或智慧，而是打开潜能的钥匙。

不要因为放弃而哭泣，要为了继续前进而哭泣。

挑战是伪装的机会，用勇气和创造力去迎接它们。

Innovation in physics often comes from looking at old problems in new ways.

每部小说都是进入人类心灵未知领域的旅程。