■ 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。

• astound
• as well
• as well as
• as well...as
• as with
• at
• at
• at all
• at issue
• atmosphere
• at once
• at one's peril
• attention
• attention 与 caution
• at that
• at the cost of
• at the expense of
• attitude
• attitude
• attitude 与 posture
• attorney
• at..., we
• at 与 in
• audience
• autograph