短语词组短語observing tube 觀察琯observing ine 眡準線Observing directly 直接計數observing station [天]觀測站;[天]觀測台;觀測站observing ability 觀察能力;觀察力Observing room 畱觀室observing frequency 觀測頻率observing pattern 觀察型樣;繙譯observe on 評論 返回 observing