1. undoubtedly
ad. 无疑，必定：Such conduct is undoubtedly wrong.
2. unique
a. ①唯一的，独一无二的：Each person's fingerprints are unique. 每个人的指纹都是不同的。
②极不寻常的，极好的：a unique opportunity 极难得的机会
3. urge
vt. ①强烈要求：They urged that we (should) take these steps.
②力劝：The shopkeeper urged me to buy a hat.
③驱策：He urged his horse on. 他策马前行。
n. 强烈的欲望，迫切的要求：an urge to join the Party 入党的迫切要求
4. urgency
n. 急迫，紧迫：a matter of great urgency 极迫切的问题
5. valuable
a. 值钱的，贵重的：Diamond is valuable.
n. (常用复数)贵重物品(指首饰)，财宝：
If you want to make sure that your valuables are safe, put them in the bank.
6. valuation
n. ①估价：make a valuation of the painting 给这幅画估价
②定价：The valuation put on the house was $90000. 这所房子估定的价格是九万美元。
7. variety
n. ①变化，多样性：His writing lacks variety.
②多种多样：Iron has a variety of uses.
③品种，种类：a new variety of apple 一种新品种苹果
a variety of 种种，多种多样
8. weight
n. ①重量，体重：What is your weight?
②负荷，重担：a weight on the mind 精神负担
③重大，重要性：a matter of great weight 重大事件
carry weight 有分量，有影响
gain weight 增加体重
lose weight 减肥
pull one's weight 干好本职工作，尽力
throw one's weight about/around 滥用权势，耀武扬威
9. widely
adv. ①广泛地，范围广地：He has read widely. 他博览群书。
②大大地：widely different 迥然不同
10. worthy
a. ①(of) 值得的，配得上的：worthy of admiration 值得赞赏的
②有价值的，可尊敬的：Helping the poor is a worthy cause.