kē xué jiā / lì yòng / guāng pǔ yí / guān cè / dào / le / yáo yuǎn / xīng xì / de / hóng yí / xiàn xiàng科学家利用光谱仪观测到了遥远星系的红移现象。Scientists used a spectrograph to observe the redshift of distant galaxies.