—— 请按键盘 空白键 开始游戏 ——

The boundary between physics and mathematics is not as clear-cut as we might think.
物理学和数学之间的界限并不像我们想象的那么清晰。
The challenges of climate change demand urgent action from the scientific community.
要使婚姻长久,就需克服自我中心意识。
对抗传染病的斗争是一项超越国界的全球性努力。