时间没有分界线来标记它的流逝，从不会有雷暴或号角声宣告新的月份或年份的开始。
Time has no divisions to mark its passage, there is never a thunderstorm or blare of trumpets to announce the beginning of a new month or year.
定义就是限制。
The development of MRI has revolutionized the field of medical imaging, allowing us to see inside the human body in ways that were previously unimaginable.
I'm here to give joy to the world and to help children all over the world.
"The past is not a place to live, but a place to learn from."
