文档内容
Unit 3 Back to the past
1．The commonly held view is that(that引导表语从句，“人们普遍认为”) people arrived in
North America from Asia via a land bridge once connecting the two continents.
2．Matthew Bennett，a specialist(n.专家) in ancient footprints and author of a study on the new
findings published(published为过去分词作后置定语) in Science.
3．...they were likely(adv.可能) made in soft ground at the edge of a wetland...(likely 还可作形
容词，构成固定搭配：be likely to do sth，意为“可能做某事”；it is likely that...，意为“可
能……”)
4．Wind probably blew dust over the surface，accumulating(accumulate v．积累) in the
prints，thus，leaving footprints that previously recorded.
5．Yet our sense of smell is in decline(下降) as a result of an unnoticed threat(一个未察觉到
的威胁) to our health：air pollution.
6．Yet the loss of a sense of smell is a condition that is often overlooked(v.忽视) though it can
bring about(导致) numerous health problems.
7．A sense of smell is linked to(与……有联系) memory as well and life is a lot less fun without
it.
8．Virtually(adv.事实上，实际上)，there is nothing that man cannot do.
9．...though it may apparently(adv.显然) be the conception(n.设想) about something that it
cannot be done.
10．It is only for his undefeated perseverance(打不败的坚持不懈) that(强调句) we have
been able to have many inventions and discoveries.
11．He went through thick and thin(历经千辛万苦) to reach his destination after months of the
strenuous(adj.艰苦的) voyage on the sea.
12．This outcome(n.成果) of his perseverance will be generated by(generate v．此处为熟词
生义，被……铭记) the world forever.
13．All the great men in history have written their names in golden letters by means of(凭借)
perseverance.
14．It is a unique precondition(唯一先决条件) to success in life.
15．The tradition started on a whim(n.突然产生的念头，心血来潮) in 2010 with Daniel
Riddick，a doctor in Hurley Children’s Hospital in Providence，Rhode Island.
16．During his stay，Daniel had bonded with(与某人有亲密关系) the kid so deeply
that(so...that 结果状语从句) he decided that on the boy’s last night there，he would do
something special for the final parting(n.离别，分别)．
17．Daniel made it a practice(熟词生义：n.习惯做法) to flicker his bike lights to kids as he leftfor the night as a fun way to say goodbye.
18．The nightly tradition became such a hit(熟词生义：n.很受欢迎的人或事物) that customers
started joining in with flashlights and cellphones too.
