天文: astronomy...
丑: shameful, ugly, disgraceful...
吸管: (drinking) straw, pipette, eyedropper, snorkel...
忠实: faithful...
国家: country, nation, state...
国防: national defense...
难处: trouble, difficulty, problem...
铜: copper (chemistry), see also...
光临: (formal) to honor with one's presence, to attend...
实地: on-site...