521.contradict v. 与……矛盾，抵触
A survey found that those who had given up cigarettes two decades ago had a higher risk of stroke than people who had never smoked. The results contradict two other studies that show that after five years of abstinence a former smoker’s stroke risk is essentially the same as that of someone who never lit up.
有份调查发现，戒烟20年的人比从未抽过烟的人，中风的几率更高。另外两项研究显示，吸烟者戒烟5年后，其中风几率基本上与从未抽过烟的人相同。前两项调查结果与后两项研究的结果正好相抵触。
注：abstinence n. 禁戒（烟、酒等）
522.convene v. 召开会议
He wants a specific timetable to expand NATO eastward, and pledged to convene a 1998 summit in Prague at which the Czech Republic, Hungary and Poland would join the alliance.
他主张订出北大西洋公约组织向东扩展的明确日期表，并且承诺将于1998年在布拉格召开首脑会议，届时捷克、匈牙利和波兰都将加入北约组织。
523.coordinate v. 协调，整合
London said it would establish an elected 90-seat Northern Ireland Assembly. Members of the new Assembly would join with parliamentarians from the Irish Republic in a new cross-border body to coordinate issues that affect both…
伦敦表示将建立北爱尔兰议会，由90名民选议员组成，这个新议会的议员将与爱尔兰共和国的国会议员合组一跨国组织，以协调与双方相关的议题。
524.covet v. 垂涎，觊觎
【同】desire
The man represents the Internet industry’s most coveted market: the estimated 85% to 90% of American homes that aren’t yet connected.
这名男子代表了国际互联网业者最渴望掌握的市场：就是那些尚未联网的美国家庭，据估计这样的家庭约占美国家庭的85%到90%。
525.crash v .电脑死机
Every computer I’ve got has crashed.
我的电脑全死机了。
526.crave v. 渴求
People were craving the simple pleasures of the sea and the sun.
人们渴望着海洋和阳光所带来的那种单纯的乐趣。
527.cripple v. 使丧失活动能力，削弱
It was her own immune system, attacking the joint in her body and crippling her so badly that she often had to use a wheelchair.
就是她自己的免疫系统，攻击她体内的关节，严重削弱她的行为能力，使她必须经常借助轮椅。
528.cruise v. 汽车定速行驶，（船、飞机）巡航
The Grand Cherokee wends its lazy way along the gently curving road, cruising at 40 km/h through rural Michigan’s autumnal landscape of gold-and-orange-dappled trees.
大型切诺基吉普车沿着弯度不大的路缓缓前行，以时速40公里的速度在密歇根乡间的秋色中缓缓行驶，沿途可见金、橙色斑驳的树木。
注：lazy adj. 慢吞吞的；dappled adj. 有斑点的，花斑的
529.crumble v. 崩溃，消失
【同】fall apart
But the deal may not go through, and with its demise the three-decade-old edifice of affirmative action may begin to crumble.
但这笔交易可能谈不成，随之而来的后果是，鼓励雇用少数民族、妇女这个实行已30年的赞助性制度，可能因此而开始消亡。
注：edifice n. 体系
530.crunch v. 咬嚼，引申为电脑高速处理
The number of bits a chip can crunch is a rough measure of its power. The old Atari games ran on 8-bit machines; Sega Genesis and Super Nintendo are 16-bit systems.
一个芯片所能处理的比特数，大致与其功能成正比。老式的Atari游戏是在8位的机器上执行；世嘉的“创世纪”和超级任天堂是16位的系统。