conserve | v. 节省；节约 | new laws to conserve wildlife in the area |
preserve | v. 保护；维护；保留（原状） | The government preserves the rights of the individual person. |
reserve | v. 保留；贮备（专门留给某人或某事） | We are reserving these seats for my parents. |
32.continual / continuous / constant
continual | a. （令人厌烦地）频繁的 | That dog’s barking is a continual annoyance. |
continuous | a. 不停的，连续不断的（语气最强，强调在时间和空间上没有间断） | Our homes and offices need a continuous supply of electricity. |
constant | a. 连续发生的，不断的，重复的 | Everything in the universe is in constant motion. |
successive | a. 连续的；接连的；相继的（强调一个接一个地发生，无间断） | This was their fourth successive win. |
persistent | a. 连绵的；持续的；反复出现的（持续很长一段时间且不间断，或经常重复，特别是以一种恼人的和无法停止的方式） | persistent rain |
33.correct / rectify / remedy / revise / amend
correct | v. 改正；纠正；修正（指纠正或改正不正确、不真实或有缺点的东西） | Their eyesight can be corrected in just a few minutes by the use of a laser. |
rectify | v. （正式用词）矫正；纠正；改正（意义较抽象，侧重指彻底改正偏离正确标准或规则的东西） | We must take steps to rectify the situation. |
remedy | v. （正式用词）改正；纠正；改进（常指在局部范围内进行纠正，尤指对困难或棘手问题的解决） | This situation is easily remedied. |
revise | v. 改变，修改（意见或计划） | I’ll prepare a revised estimate for you. |
amend | v. （书面用词）修正，修订（法律文件、声明等）（指改进使更好，符合更高的要求） | He asked to see the amended version. |
34.credible / convincing / plausible
credible | a. 可信的，可靠的（近义词：convincing） | That the student told the teacher a credible story that she missed classes because she was sick. |
convincing | a. 令人信服的，有说服力的 | She sounded very convincing to me. |
plausible | a. （借口或解释）有道理的，可信的 | The only plausible explanation is that he forgot. |
35.decline / refuse / reject / deny
decline | v. 谢绝，婉言拒绝 | I invited her to join us, but she declined. |
refuse | v. 拒绝（指态度坚决的拒绝） | She refused to accept that there was a problem. |
reject | v. （论点、想法、计划）拒绝接受，不予考虑 | All our suggestions were rejected out of hand. |
deny | v. 拒绝承认，拒绝接受 | The department denies responsibility for what occurred. |
36.decrease / diminish / lessen / reduce / dwindle / decline
decrease | v. （使大小、数量等）减少，减小，降低（指逐渐地、不断地减少） | The population decreaseda lot last year. |
diminish | v. （使尺寸、影响力、密度等）减少；减弱；降低 | His influence has diminished with time. |
lessen | v. （一般用词）（尺寸、数量、程度、影响力）（使）缩小；（使）减少；（使）减轻 | Make sure that your immunizationsare up to date to lessen the risk of serious illness. |
reduce | v. （一般用词）减少，缩小（尺寸、数量、价格等） | It reduces the risks of heart disease. |
dwindle | v. （数量上）（逐渐）减少，变小，缩小 | Exports are dwindling and the trade deficit is swelling. |
decline | v. 减少；下降；衰弱；衰退（数量、重要性或强度） | Support for the party continues to decline. |
37.delay / postpone / defer / suspend / prolong
delay | v. （一般用词）延迟；延期；推迟（常用于因为不可控因素而推迟，也可指有意推迟） | Her late arrival delayed the start of the meeting. |
postpone | v. （正式用词）延迟；延期；暂缓（语气较强，多指有安排的延期，常会指明延期时间） | Our meeting for today was postponed until next week. |
defer | v. （正式用词）推迟；延缓；延期（语气强于postpone，多指故意拖延） | She had applied for deferred admission to college. |
suspend | v. 延缓；暂缓；推迟（指暂时中断以待某种条件的实现） | The introduction of the new system has been suspended until next year. |
prolong | v. 延长（指把时间延长至超过正常或通常的限度） | The operation could prolong his life by two or three years. |
38.dip / immerse / submerge
dip | v. （快速地）浸，蘸（液体） | The artist dipped his brush in the paint. |
immerse | v. 使浸没于（液体） | Students immerse themselves in their studies. |
submerge | v. 使潜入水中，没入水中，浸没，淹没（多指全部浸没在水下达一定深度） | The girl was submerged in the shallow end of the pool. |
39.disappear / vanish / fade
disappear | v. 消失，不见 | The plane disappeared behind a cloud. |
vanish | v. （莫名其妙地）突然消失 | All hopes of a peaceful settlement had now vanished. |
fade | v. 逐渐消逝，逐渐消失 | The laughter faded away. |
40.divide / assign / distribute / allocate
divide | v. （一般用词）分配；分享；分担（侧重将某物分成若干份分配给他人，当某物一分为二时，含平均分配之意） | Paul divides most of his spare time between the study and his bedroom. |
assign | v. 分配（某物）；分派，布置（工作、任务等）（指按照某种原则进行的硬性分配，也不一定是很公平的） | The teacher assigned a different task to each of the children. |
distribute | v. 分发；分配；分送（通常指以整体或定量分为若干份来分配） | The organization distributed food to the earthquake victims. |
allocate | v. 分配；分派；划拨（主要指金钱、财产、权力或领土等的分配，着重分配的比例和专门用途） | The city government allocated money for schools and the police in this year’s budget. |
