twin：成比的，成对的，双胞胎

词源同two,二。引申词义成双的，成对的等，后用于指双胞胎。

• abyss
• ac-
• acacia
• academic
• academician
• academy
• academy
• acadian
• a cappella
• accede
• accelerate
• acceleration
• accelerator
• accelerometer
• accent
• accentuate
• accept
• acceptable
• acceptance
• accepted
• access
• accessible
• accession
• accessory
• accident