内界膜

internal conflict

internal environment (enviromment ) environment (enviromment )

certified internal auditor

internal lining

internal-external upset tubing【油气】

conjoint drive for lift valves and drives for internal-combustion engines

arteria carotis interna【解剖】;internal carotid【解剖】;internal carotid artery【解剖】

internal nucleophilic substitution【有化】