O 开头单词
observe thing as itself [文学]以物观物
observe publicly and investigate privately 明察暗访
observe on 评论
observe mourning for one's parent 守孝
observe carefully 认真观察 细心观察 仔细观察
observe vt. 庆祝 vt. 观察；遵守；说；注意到；评论 vi. 观察；说；注意到；评论
observatory n.天文台；气象台；了望台
observatories n.天文台；气象台；了望台
observations n.观察值名词observation的复数形式.
observationally adv.根据观察
observational techniques in space astronomy [天文学]空间天文技术
observational study 观察研究；观察性研究
observational network [地球科学]观测网测站网
observational gross error [测绘科学技术]测量粗差
observational error [劳经] 观察误差