时间:2018-12-30 作者:英语课 分类:英语语境识词


英语课

  Unit 16

What Is Cancer?

As you probably know from the appeals being made for funds to fight cancer, and from all the research that is being down on this subject -- cancer is a great threat to the health and life of mankind. We will only discuss cancer in general terms, so you can have a general idea of what happens in a body that has cancer.

A cancer is a continuous growth in the body which does not follow the normal growth pattern. The cells forming the cancer spread through the body to parts which may be far from the spot where the cancer began. Unless it is removed or destroyed, the cancer can lead to the death of the person.

Cells in the body are growing all the time. As they wear out and disappear, their places are taken by new cells of exactly the same kind. But cancer cells look and act differently from normal body cells. They look like the young cells of the part of the body where they started -- but different enough to be recognized as cancer when seen through a microscope.

When these cancer cells divide and increase in number, they don't change into the fully 1 grown form and then stop reproducing 2. Instead, they remain young cells and continue to increase in number until they are harmful.

As cancer cells grow, they do not remain in one spot, but separate and move in among the normal cells. They may become so numerous that the normal cells in this part of the body cannot  continue to work or even remain alive. When the cancer gets into the blood, it is carried to distant parts of the body. There it may grow to form large masses which interfere 3 with the activities of the normal cells.

Unless the growth and spread of the cancer is stopped, the patient will die. That is why it is important to have periodic 4 examinations to detect and treat cancer before it has spread too far.

Cancers are not spread from man to man by contact. No drug has been found that cures completely and is useful for all kinds of cancer. One of medicine's greatest goals is to understand fully the nature and cause of cancer, and to find a way to prevent and cure it.



adv.完全地,全部地,彻底地;充分地
  • The doctor asked me to breathe in,then to breathe out fully.医生让我先吸气,然后全部呼出。
  • They soon became fully integrated into the local community.他们很快就完全融入了当地人的圈子。
复制( reproduce的现在分词 ); 重现; 再版; 生殖
  • Mind has become self-reproducing through man's capacity to transmit experience and its products cumulatively. 通过传递生活经验和积累创造的产品,人类的智慧在不断地进行着自我丰富。
  • Spores form a lipid membrane during the process of reproducing. 孢于在生殖过程中形成类脂膜。 来自英汉非文学 - 生命科学 - 预防生物武器
v.(in)干涉,干预;(with)妨碍,打扰
  • If we interfere, it may do more harm than good.如果我们干预的话,可能弊多利少。
  • When others interfere in the affair,it always makes troubles. 别人一卷入这一事件,棘手的事情就来了。
adj.周期的,定期的,时而发生的
  • Long long ago,we knew the periodic motion of a planet.很久以前,我们就知道行星的周期运动。
  • These arrangements are subject to periodic reviews.这几项安排每隔一定时间须予复查。
学英语单词
acanthoidine
adjacent line
air-breather
ambiguohypoglossal
avoking
bestower
buffer reagent
buy-and-holds
catanator
caveling
chlordan
cost-reimbursement
de-activation
Deinotherioidea
democratic values
desoxypyridoxine
dexamethasones
diameter of working disk
diatonic auxiliary note
discretamine
domain magnetization
double-layer fluorescent screen
dropper plate of free grain
Drusze
dynamicize
editon
elbow equivalent
electrode-travel motor
embraced
endomycopsis hordel
Engler viscosimeter
fairwells
fang-likest
fawns on
federal radio act 1927
fling oneself into the breach
fluoroolefin
free-taking
general staff
grinding media charge
hachi
hard-fightings
Hatsukaichi
HRST
ignition of precipitate
inverse mercator
iodine trap
jM-factor
karhunen loeve transform (klt)
kemerer
laughing-eyed
liege poustie
light-alloy armo(u)r
Longué-Jumelles
lophocoronids
Louis Henri
market chaotic
multistage linear amplifier
Narfeyri
Ngoso
octuplex
optical fiber ribbons
organised-crimes
pass in a program
pelviroentgenography
photoelectrocatalytic reactor
phrenemphraxis
polar moments of inertia
portcullised
practice range
prevelar
primordisl endoderm cells
reave
Rectocillin
residual concentration
Riemann upper integral
rifle shot
safo
saltations
screw-tap
sebiferic acid
second anchor
short-lived asset
sleight-of-hand
sniol
sound-barriers
speed change control
stalk extractor
structurality
Tharrawaw
thirst bucket
thoughted
three-dimensional imaging
throw dust in someone's eyes
transnationally
unwed mother
vel non
voiced sounds
votes down
well-customed
wharfies
wrecking