grab[ɡræb]
to take hold of something or someone suddenly and roughly
攫取，抓取;强夺；霸占；夺走

grip：[grɪp] 两条规则就可搞定，不多说了，以前听过课的朋友都知道。
a tight hold on something or someone
to hold very tightly
to keep someone's attention completely
control over something or someone
n. 紧握；柄；支配；理解
vt. 紧握；夹紧；吸引;抓住(注意力等)
vi. 抓住

例句
He is just beginning to get a grip of the subject.
他刚刚开始能掌握这一科。
His performance gripped the audience.
他的表演深深地吸引住观众。

grasp英音：[grɑ:sp]美音：[græsp]
to quickly take something in your hand(s) and hold it firmly
to understand something, especially something difficult
n. 抓住；理解；控制
vt. 抓住；领会
vi. 抓

例句
I don't grasp your meaning.
我不懂你的意思。
The little girl grasped her mother's arm.
小女孩抓住了她母亲的手臂。

耶鲁公开课 - 心理学导论课程节选
They find it very difficult to grasp the world as another person might see it.
他们很难从他人的角度出发来认识世界

生活大爆炸第2季第10集
You have a really good grasp on this.
Maybe you could talk to her?
你很擅长这个嘛。
你和她谈谈是不是更好？

clasp / kla:sp/
to hold someone or something firmly in your hands or arms
clasp something (+ adverb/preposition) to fasten something with a clasp
n.扣子，钩子；别针;握手
vt. 紧抱；扣紧；紧紧缠绕
vi. 扣住

例句
The girl clasped the doll tightly.
小姑娘紧紧抱着洋娃娃。
People clasp their hands together and say "gong-xi, gong-xi," meaning "congratulations" during Chinese New Year.
在中国的新年期间,人们会拱手说“恭喜,恭喜”,意即表示“祝贺”。

assumption ：[ə'sʌmpʃən]
a belief or feeling that something is true or that something will happen, although there is no proof
the act of taking or beginning to have power or responsibility

n.采取；假定；担任；承担；傲慢；自负
assume-采取，假定，傲慢
sume-词根：抓、摘 summer

例句
The facts proved her assumption wrong.
事实证明她的设想是错的。
The new governor's assumption of office takes place next Tuesday.
新任州长于下星期二就职。

耶鲁公开课 - 死亡课程节选
Despite my talking about numbers, of course, there's no particular assumption that we can really give precise numbers to this.
尽管我一直在说数字，当然没有具体的假设能让我们,得出一个准确数字。

趣味单词

cling / kliŋ/
to stick onto or hold something or someone tightly, or to refuse to stop holding them
vi.粘住；依附；坚持；紧贴

clay-粘土
spray喷雾
spring喷泉
sway摇摆
swing秋千

昨日重现

2002年1月CET-6真题
The manager gave her his _____ that her complaint would be investigated.

A.assurance
B.assumption
C.sanction
D.insurance

2002年1月CET-6真题
We should _____ our energy and youth to the development of our country.

A.dedicate
B.cater
C.ascribe
D.cling

TEM-4
At the party we found that shy girl ____her mother all the time.

A.depending on
B.coinciding on
C.adheringto
D.clinging to

本题解析：
【句意】聚会时我们发现那个腼腆的姑娘总是紧紧抓住她母亲。【难点】cling to意为“紧紧抓住”;depend on意为“依靠，取决于”;coincide意为“相符，与…一致”;adhere to意为“粘附，遵守，坚持”。

2004年6月CET-4真题
The group of technicians are engaged in a study which _____ all aspects of urban planning.

A.inserts
B.grips
C.performs
D.embraces

答案 AADD