man-machine communication
人-机通信

• arm-tie
• Arny Solutions
• aromatic couple
• aromatic molecule
• aromatic system
• arrangement
• array
• array component
• array factor
• array list
• array theorem
• arrest
• arrester
• arresting lever
• arrest point
• arrival rate fluctuation
• arrow
• arrowhead
• arsenic
• arsenic glass
• arsenic mirror
• arsenic-modified selenium glass
• arsenic-sulfur glass
• arsenic triselenide glass
• Arsenic Trisulfide