They live happily for others and no one notices the sacrifices they make. At last the little cricket on the hearth ceased to sing sweetly, and the bright sunshine died away, leaving only silence and shadow.
她们开心地为别人活着，没人留意她们所做出的牺牲。最后，炉上的小蟋蟀停止了甜美的歌唱，灿烂的阳光消逝，只留下了寂静和阴影。
The ability to focus attention is crucial for learning, memory, and performance in complex tasks.
Science is a collaborative symphony, not a solo performance.
The Langlands program is a challenge to our understanding of the nature of mathematical truth.
要在计算机科学中创新，首先必须掌握基础。