■ under-

这是一个很有用的前缀，用了它，往往可以行文更为简短。

• The FDA has long been underfunded and understaffed. (US News & World Report, Sept. 15-22, 2008, p.27)药物食品管理局长期以来一直经费短缺，人手不足。

• come 与 go
• comic
• comical
• comic 与 comical
• coming through
• coming through, please
• coming through. 或 coming through, please.
• command
• commit
• commitment
• common
• common knowledge
• common sense
• common sense 与 common knowledge
• communication
• community
• company
• compare
• compared
• competition
• competitive
• compile
• compile 与 compose
• complement
• complement 与 compliment