理论与观测之间的相互作用推动了天体物理学的发展。
The interplay between theory and observation is what advances astrophysics.
There are many Beths in the world, shy and quiet, sitting in corners till needed, and living for others so cheerfully that no one sees the sacrifices till the little cricket on the hearth stops chirping, and the sweet, sunshiny presence vanishes, leaving silence and shadow behind.
There is no such thing as an inheritance of capacity, talent, temperament, mental constitution and characteristics.