observation
英 [ɒbzə'veɪʃ(ə)n]
美[,ɑbzɚ'veʃən]
- n. 观察；监视；观察报告
词组搭配
under observation
(especially of a patient or a suspected criminal) being closely and constantly watched or monitored
（尤指病人或嫌疑犯）在观察中；在监视中
he spent two nights in hospital under observation.
他在医院里被观察了两夜。