Solid geometry has enabled astronomers to calculate the positions of the heavenly bodies relative to one another.

Thewheelsofthefirstroadvehicleswerefashionedfromcrudestonedisks.

The fear of smallpox, which terrorized the eighteenth century, has no analogy(likeness) today.

Mary McCarthy s satires 讽刺文学 are couched in a prose style that has a classic precision.

Insect pests are among the leading causes of crop failure.