1. bicentennial /ˈbaisenˈtenjəl/

-- two hundredth anniversary

The bicentennial of George Washington's birth was celebrated in 1932.

乔治·华盛顿200周年生日纪念于1932年举行。

 

2. semicircle /ˈsemɪˌsɜ:kəl/

-- half of a circle 

At the end of the lesson, a group gathered about the teacher in a semicircle to ask additional questions.

下课后，一群学生聚在老师身旁围成半圆形，问一些额外的问题。

 

3. bisect /baɪˈsekt/

-- divide into two equal parts

A diameter is a line that bisects a circle.

直径就是平分一个圆的直线。

 

4. bicameral /baiˈkæmərəl/

-- consisting of two chambers or legislative houses

The American legislature is bicameral; it consists of the House of Representatives and the Senate.

美国立法制度是两院制的；包括众议院和参议院。

 

5. biennial /baɪˈeni:əl/

-- occurring every two years

A defeated candidate for the House of Representatives must wait two before running again, because the election are biennial.

一位竞选失败的众议院候选人必须等两年才能再度竞选，因为选举时两年举行一次的。

 

6. bimonthly /ˈbaiˈmʌnθli/

-- occurring every two months

We receive only six bills a year because we are billed on a bimonthly basis.

我们一年只收到六次账单，因为我们是双月送账制。

 

7. semiannual /ˈsemiˈænjuəl/

-- occurring very half year or twice a year; semiyearly

Promotion in our school is semiannual; it occurs in January and June.

我们学校每半年提升一次；分别在1月和6月进行。

 

8. semimonthly /ˈsemiˈmʌnθli/

-- occurring every half month or twice a month

Employees paid on a semimonthly basis receive two salary checks per month.

半月付薪制的职员一个月收到两次薪水支票。

 

9. bilateral /baiˈlætərəl/

-- having two sides

French forces joined the Americans in a bilateral action against the British at the Battle of Yorktown in 1781.

法军加入美军形成双边行动，在1781年的约克镇战役中共同对抗英国。

 

10. bilingual /baɪˈlɪŋgwəl/

-- 1. speaking two languages equally well

2. written in two languages

Montreal has a large number of bilingual citizens who speak English and French.

蒙特利尔有很多市民能说英、法两种语言。

Some schools in Spanish-speaking communities send bilingual notices, written in English and Spanish, to the parents.

一些在西班牙语区的学校会寄给学生家长用英语及西班牙语两种语言写成的通知。

 

11. bipartisan /baɪˈpɑ:tɪzən/

-- representing two political parties

Congressional committees are bipartisan; they consist of both Democratic and Republican member.

国会的委员会是两党制的；包括民主与共和两党的党员。

 

12. semiconscious /semiˈkɔnʃəs/

-- half conscious; not fully conscious

In the morning, as you begin to awaken, you are in a semiconscious state.

早晨你刚醒来时处于一种半清醒的状态中。

 

13. semidetached /ˈsemidiˈtætʃt/

-- partly detached; sharing a wall with an adjoining building on one side, but detached on the other

All the houses on the block are attached, except the corner ones, which are semidetached.

这一街区的房屋都互相毗邻，只有拐角那些半独立式的房子例外。

 

14. semiskilled /ˈsemiˈskild/

-- partly skilled

Workers who enter a semiskilled occupation do not have to undergo a long period of training.

进入只需半熟练技巧行业的工人不必接受长时间的训练。