Fit for Life

the thought did occur to me.
[+ that] it never even occurred to us that he hadn't been invited.
violence of some sort seems to occur in every society.
in…form=in the form of…
the lawn was laid out in the form of the figure eight.
4. a year later, in 1900, aspirin was sold in shops as a tablet containing 500 milligrams of asa. (p18) 一年以后，阿司匹林被制成片劑在藥店出售，每片含有200毫克的乙酰水楊酸。
contain
注意比較:
include  v. [t] to contain sth. as a part of sth. else, or to make sth. part of sth. else:
the book contains 40 maps, including a map of china.
the bill includes tax and service.
tax and service are included in the bill.
5. lawrence craven, a doctor from the usa, is the author of several published reports, one of which introduced the idea in 1953 that aspirin could reduce the risk of heart attacks by thinning blood. (p18) 美國的一位醫生勞倫斯•克雷文發表了好幾篇報告，其中1953年的一篇報告提出了阿司匹林可以稀釋血液。
thin  adj. (thinner, thinnest) having a small distance between two opposite sides:
a thin book     thin black lines    a thin jacket    a thin soup
v. [t] to make a substance less thick, often by adding a liquid to it:
thin the sauce down with a little stock.
6. … and in 1977, a study carried out in the usa showed that the chemical asa in aspirin could prevent a stroke, which is a type of serious illness when blood vessels in the brain burst suddenly or are blocked. (p18) 1977年，美國的一項研究證明，阿司匹林中的化學物質乙酰水楊酸能預防中風。中風是由于大腦血管爆裂或梗塞而產生的一種突發疾病。
block
n. [c] 1) a block of wood/ice   2) a block of tickets/seats/shares
3) an office block        4) the museum is just six blocks away.
my friend and i live on the same block.     5) i took a walk around the block.
6)a block in (= an object blocking)
v. [t] a fallen tree is blocking the road.
my view was blocked by a tall man in front of me.
she was very talented and i felt her parents were blocking her progress.
7. in 1999, aspirin was 100 years old and yet there have been more discoveries on how it can help increase the length of people’s lives. (p19) 到1999年，阿司匹林已有1XX年的歷史，然而關于它如何幫助延長人類壽命方面還有更多的發現。
length
n. 1) [c or u] the boat is ten metres in length.
the length of the bay is approximately 200 miles.
2) [c] a length of rope        3) [c] the amount of time sth. takes: