robot
n. a machine that can move and do some of the work of a human being and is usu. controlled by a computer 机器人

sorrow
n. sadness, grief

prehistoric
a. of a time before events were written down

formula
n. a fixed way of doing sth.; method 公式，程式

decisive
a. showing or marked by determination and firmness

exterior
a. on the outside; outer
n. an outer part, surface or appearance

clash
n. a strong disagreement; conflict

lurk
vi. wait in hiding. esp. for an evil purpose; exist unseen

joint
a. done or shared by two or more people

headline
n. a line usu. printed in large type at the top of a newspaper article

hectic
a. very busy; rushed

badger
vt. bother by requesting sth. repeatedly

tragedy
n. a serious play that ends unhappily; a terrible event; disaster

historian
n. an expert in history; a person who writes about history

craft
n. a trade or art needing skill, esp. with one's hands 工艺

covertly
ad. secretly

poetry
n. (the art of writing) poems

endeavor
n. an earnest effort or attempt

sober
a. not drunk; serious, solemn

plodding
a. proceeding in a slow or dull way

phalanx
n. a closely massed body of persons, animals, or things; a number of persons united for a common purpose 方阵，密集的人群（兽群、东西）；为一个共同目标而团结起来的一群人

soulless
a. having or showing no attractive or tender human qualities

electromagnetism
n. magnetism produced by an electric current; the branch of physics that deals with electricity and magnetism 电磁（学）

slice
n. a thin flat piece cut from sth; portion

electronics
n. the study of electrons and their behavior and of electronic equipment such as computers

stolid
a. not easily excited; showing no emotion; seeming dull

awe
n. a feeling of wonder and fear mixed together with deep respect

underarm
a. (euph.) of or for the armpit （为）腋下的

deodorant
n. a man-made chemical substance that destroys or hides unpleasant smells, esp. those of the human body

deride
vt. laugh at or make fun of as of no value

fuzzy
a. not clear in shape or sound; confused

fuzzy-brained
a.

egghead
n. (derog.) a clever, highly-educated person, esp. one who is impractical

minority
n. a group of people of a different race, religion or nationality from the rest of society

tuck
vt. put or store in a safe or secret place

site
n. a place where sth. of special interest existed or happened