水晶: crystal...
爷爷: (coll.) father's father, paternal grandfather...
化纤: synthetic fiber...
枢纽: hub (e.g. of traffic network), hinge, pivot, fulcrum...
晴: clear, fine (weather)...
邮件: mail, post, email...
救护车: ambulance...
紧凑: compact, terse, tight (schedule)...
误: mistake, error, to miss, to harm, to delay, to neglect, mistakenly...
当然: only natural, as it should be, certainly, of course, without doubt...
