The boundary between physics and mathematics is not as clear-cut as we might think.
The stone industry must embrace sustainability to thrive in the modern world.
使卵石臻於完美的，并非锤的打击，而是水的且歌且舞。
The real moral test of a society is how it treats those who are at the dawn of life, the children; those who are in the twilight of life, the aged; and those who are in the shadow of life, the sick, the needy and the handicapped.
