原焦油 crude tar ; primary tar

原焦虑 primal anxiety

原焦油和粗苯 Crude tar and crude benzole

强聚焦原理 strong focusing principle ; alternating gradient focusing principle ; principle strong-focussing

交变陡度聚焦原理 alternating-gradient focusing principle

聚焦原创 focus on original production

原油结焦蒸馏器 crude coking still

紧张焦虑的原因 The reasons for anxiety

原先即存在焦虑 Preexisting anxiety