adj. 零值的，等于零的，（协议） 无法律效力，失效的；
[例句] A spokeswoman said the agreement had been declared null and void...
[例句] The declaration was null and void as it was proclaimed in completely illegal circumstances.
n. 虚假说，零假说；vt. 使抵消，使无效；
[例句] He used his broad executive powers to nullify decisions by local governments...
[例句] It is worth remembering that previous wills are nullified automatically upon marriage.
n. 摘要，梗概，大纲；
[例句] For each title there is a brief synopsis of the book.
vt. 窜改；vi. 篡改，（用不正当手段）影响，干预，瞎摆弄，贿赂；n. 夯，夯具，捣乱者，填塞者，反射器；
[例句] I don't want to be accused of tampering with the evidence...
[例句] He found his computer had been tampered with.
v. 长途跋涉，拖着腿走，徒步旅行，（牛）拉货车；n. 长途跋涉，艰难的旅程，远距离行走；
[例句] ...trekking through the jungles...
[例句] This year we're going trekking in Nepal.
n. 混乱，焦虑；
[例句] ...the political turmoil in South Africa.
[例句] Her marriage was in turmoil...
adj. 非官方的，非正式的，不作为官方活动的；
[例句] Staff voted to continue an unofficial strike in support of seven colleagues who were dismissed last week...
[例句] Official reports put the death toll at under one hundred, but unofficial estimates speak of at least two hundred dead.
n. 迫击炮，砂浆，房产，研钵；vt.& vi. 用迫击炮攻击（或袭击），用灰泥涂抹[结合]；
[例句] The two sides exchanged fire with artillery, mortars and small arms...
[例句] He was killed in a mortar attack.
vt. 和…起冲突，和敌军起冲突，反抗，抗拒，相对：放在某事物对面以对比或平衡；vi. 对抗，对立；adj. 强烈反对某事物的，（表示对比）而，相对于，相反的，敌对的；
[例句] I am utterly opposed to any form of terrorism...
[例句] We are strongly opposed to the presence of America in this region.
n. 所有人，业主，地主；
[例句] ...the proprietor of a local restaurant...
[例句] He was the sole proprietor with total management control.
n. 水坑，胶土；vt. 使泥泞，把…做成胶土，搅
[例句] The road was shiny with puddles, but the rain was at an end.
[例句] ...puddles of oil.
n. 容器，放置物品的地方；
adj. 显著的，突出的，重要的，主要的，跳跃的，（指角）凸出的；n. 凸角，[建]突出部，进攻或防卫阵地的突出部分；
[例句] He read the salient facts quickly...
[例句] Chronic fatigue is also one of the salient features of depression.
adj. 功利的，功利主义的，实利主义的，有效用的，实用的；n. 功利主义者，实用主义者；
[例句] It was James Mill who was the best publicist for utilitarian ideas on government.
[例句] Bruce's office is a corner one, utilitarian and unglamorous.
n. 动态静止，动态平衡，（社会群体的）自我平衡，原状稳定；
n. 单调的语调，单调的声音；adj. 发单调音的，单色的；vt. 单调地读；
[例句] The evidence was read out to the court in a dull monotone.
[例句] He was seen on TV delivering platitudes about the crisis in a monotone voice.
adj. 混杂的，杂色的，五颜六色的；n. （丑角穿的）杂色衣服，小丑；
[例句] ...a motley collection of vans, old buses, cattle-trucks, and even a fire engine...
[例句] The volunteers seem a motley crew.
vi. 安居，舒适地居住，偎依，贴靠，半隐半现地处于，[古语] 筑巢；vt. 满意地依偎或紧贴，抱，放，安置；
[例句] John took one child into the crook of each arm and let them nestle against him...
[例句] Jade nestled her first child in her arms.
vt. 削皮，削减，修剪（指甲等）；
[例句] Pare the brown skin from the meat with a very sharp knife...
[例句] He took out a slab of cheese, pared off a slice and ate it hastily.
n. （因发怒等）暴跳，暴怒，狂暴行为，乱闹；v. 暴跳，暴怒，狂暴地乱冲；
[例句] Hundreds of youths rampaged through the town, shop windows were smashed and cars overturned...
[例句] He used a sword to try to defend his shop from a rampaging mob.