| abrupt | a. 突然的，意外的(unexpected) |
| abundant | a. 充足的, 丰富的(rich, plentiful) |
| accessible | a. 易接近的；可得到的(available); 可进入的 |
| accomplished | a. 多才多艺的(all-round); 完成了的(*achieved) |
| accord | n. 一致; 符合(agreement) |
| account | n. 解释(interpretation) |
| accumulate | v. 积累，堆积(build up, collect) |
| accuracy | n. 准确(性)，精确(性)(nicety, precision) |
| accurate | a. 正确的, 精确的(*precise, exact) |
| acknowledge | vt. 承认，确认(recognize, admit); 对...表示感谢(express gratitude) |