2. to know or feel closely the nature of (a person, feelings, etc.) 领会，了解(人，感情等)
3. working for; controlled by 为．．．工作；受．．．支配
underground also tube BrE; subway AmE n. a railway system in which the trains run in passages under the surface of the ground 地下铁道
understand v. 1. to know or get the meaning of (something) 懂；理解；明白
2. less than;
syn. below 少于；低于；在．．．以下
ant. over
2. undecided or unable to decide 未作决定的；无法断定的
be uncertain about 对．．．不确定
uncle n. the brother of one’s father or mother, or the husband of one’s aunt伯父；叔父；舅父；姑丈；姨丈
under adv. in or to a lower place; below 在下；往下；少于
prep. 1. directly below; covered by 在．．．下面，在．．．底下；被．．．遮掩着
3. to change to 变成 (辩析) turn：强调变化结果。有成为完全不同的事物的含义。例：The milk turned sour. 牛奶变酸了。turn还常用于颜色的变化。例：The trees turn green. 树变绿了。grow: 有逐渐变成新的含义，强调变化过程。例：The trees is growing tall. 那棵树逐渐长高了。become, get, go 通常表示变化的过程已经完成。其中become 比较正式，get和go较口语化。例：Tom becomes ill.汤姆病了。He has got poor.他变穷了。The food must have gone bad. 食物一定变坏了。
n. a chance or duty to do something in a particular order of time or place 依次序轮流得到的机会; 轮到的责任
turn down 关小; 调低
turn ... into... 变成; 变得; 把...... 变成......
turn off 关掉(自来水、电灯、收音机等)
turn on 开；旋开(电灯、无线电等)
turn over 翻到; 翻身; 翻(书页)
turn to 翻到; 转向; 求助于
turn up到达; 出现
twelfth [twelf ] num. 第十二
twelve [twelv] num. the number 12 十二
twentieth [tweti ] num. 第二十
twenty [twenti] num. the number 20 二十
twice [twais] adv. two times 两次; 两倍
two [tu:] num. the number 2 二
type [taip] v. to use a typewriter 打字
n. a kind; a sort; an example of a group 型; 类别; 典型 (辩析) kind表示种类时，指性质相同的东西；type主要指类型、样式；sort 指种类基本相似的东西，讲话时意思较含糊。
type-writer [‘taip’rait ] n. a machine for writing 打字机
typist [‘taipist] n. a person who type 打字员
U
ugly adj. unpleasant to see 丑陋的，难看的
UK n. abbrev.. United Kingdom (of Great Britain and Northern Ireland) (大不列颠及北爱尔兰) 联合王国
umbrella n. an arrangement of cloth over a folding frame with a handle, used for keeping rain off the head 伞，雨伞
unable adj. not able; without the power, knowledge, time, etc., to do something 不能的；无能为力的；不胜任的；没时间做的
uncertain adj. 1. not certain; doubtful 不确定的；不明确的；可疑的
2. to change direction 转变方向
2. to see if you like something, or if something works 试
try on 试穿
try one's best 竭尽全力
try out 试验
Tuesday [‘tju:zdi] n. the third day of the week 星期二
turn [t[:n] v. 1. to go around; to make something go round 转; 使转动
2. faithful 忠诚的
come true 实现
trust [tr st] v. to believe in a person or thing 信任; 相信
n. belief in the honesty, etc. of a person 信任
truth [tru: ] n. what is true 真实; 实际情况, 真相; 真理
try [trai]v. 1. to do what one can; to make an attempt 试图; 尝试;验想办法
2. to give medical help to 医治; 治疗
treatment [‘tri:m nt] n. medical care from a doctor 治疗
tree [tri:] n. a large plant from which we get wood 树
trick [trik] n. practical joke 恶作剧
play a trick on 捉弄
trip [trip] n. a short journey 远足; 旅行
have a good trip 旅行愉快
trouble [‘tr bl] n. sadness, difficult, worry 烦恼; 困难; 麻烦
v. to worry, to disturb 烦恼; 扰乱
in trouble 处于困难(苦恼)中
trousers [trauz z]n.(pl.) a garment which covers the legs, usually worn by men 裤子, 长裤
truck [tr k]n. a large car for carrying heavy loads by road 卡车
true [tru:] adj. 1. correct, right, not a lie 真的, 真实的
2. a job for which some training is needed 行业; 手艺; 工作
v. buy and sell; engage in trade 交易; 经商 (辩析)business 日常用语，含义较广，泛指“做生意”，常有以利润为主的含义，例：What business are you in? trade 最普通的用词，一般不同的商业机构之间的商品交易或表示各种特殊商品的贸易和对外贸易。例：Japan does a lot of trade with China.
traffic [‘tr fik] n. cars, buses, etc. moving in the roads 交通
train [trein] n. several carriages joined together on the railway 列车; 火车
v. to teach; to practise 培养; 训练
trainer ['trein ]n. a person who trains 训练人; 教练
training ['treini ] n. training or being trained 训练; 培训
training centre 训练中心
translate [tr ns’leit] v. to change from one language into another 翻译
translate ... into... 把......译成......
transport v. [tr ns’p :t] to carry something from one place to another 运输; 输送
n.[‘tr nsp :t] the act of moving or carrying something 运输
travel [‘tr vl] v. (traveled, traveling) to go from one place to another 旅行
n. the act of travelling 旅行
treasure [‘tre ] n. a collection of precious things 金银财宝; 珍宝
treat [tri:t] v. 1. to behave towards 对待
treat ... as ... 把......当作......