previous – former 以前的
maintain – hold – think 认为
cause – bring about – lead to – result in 导致
error – mistake 错误
component – ingredient – element 成分
solve – settle 解决(问题)
probe (A 级) – explore 探查
involve – include 包括
numerous – a number of – a lot of – abundant (B 级) – plentiful 大量的, 丰富的
stay –remain 保持(用作半系动词)
rest – break 休息
account for – explain 解释
examination – test 测试， 考试
examine – check up 检查， 核对
gain – put on 增加
put up – lift – raise 举起
put up – build – construct 建造
foster – cultivate – cultivate (B级)培养
alleviate (A级) – relieve -- lessen 减轻，减少
severe –serious -- bad 严重的
severe – strict 严厉的
sharp– acute – severe 剧烈的(疼痛)
severe – hard - tough艰苦的
quit – give up – abandon放弃
subject – topic 话题
remarkable – exceptional – extraordinary – great – marvelous – striking – special – unusual显著的
uneasy (A 级)– worried 焦虑的
demolish (A 级)– pull down 拆毁
adverse (A 级)– unfavorable 不利的， 相反的
courteous (A 级)– polite – respectful 有礼貌的
courtesy (A 级)– politeness – good manners 礼貌
insane (A 级) – crazy – mad 疯狂的
sensible –wise – advisable (B 级) 明智的
clever – intelligent – wise – bright 聪明的
(be) exhausted – (be) tired – (be) worn out 疲惫
believable – convincing -- credible (B 级) 可信的
original – initial 最初的
original – creative 创造性的
competent – capable – able 有能力的
vigorous (A级)– energetic – dynamic (B级) 精力充沛的， 有活力的