常見例句The first person to provide observational evidence for expansion was American astronomer Vesto Slipher, who used the spectra of stars to measure the velocities of nearby galaxies. 第一位提供宇宙膨脹觀測證據(jù)的人是美國天文學家斯里佛（VestoSlipher），他利用恒星光譜來測量鄰近星系的速度。Slipher, Vesto Melvin 斯里弗 返回 Slipher