2.speed up
3.be located
4.be allowed to
5.according to
6.contribute to
7.derive from
8.continue doing
9.in the face of
10.continue doing
11.stop sb. from doing sth。
12.cut down
13.turn a blind eye
14.pay off
15.regard…as
16.make a living
17.be worth doing
18.make…into…
19.on the spot
20. in addition to
text b life in the tundra
短语表达
1.be known as
china is known as one of the four ancient civilizations。
she is known as a great singer。
2.adapt to
it is hard for him to adapt to the food and climate there。
he is well adapted to the harsh environment。
3.threat to
heart diseases are major threats to life。
darkness is a threat to him。
4.to some degree
i agree with you to some degree。
to some degree he hated his work。
5.as if by magic
his face turned green as if by magic。
the sun appeared after the rain as if by magic。
6.give birth to
mrs. brown gave birth to a baby girl last week。
the summer sun gives birth to many species of arctic plants。
7.in search of
the whole family was out in search of the lost pet dog。
all his life he has been in search of the meaning of life。
8.migrate to
many birds migrate to the south in winter。
he migrated from canada to the united states when he was 30。
9.in turn
we drove to the beach last week. the two of us took the wheel in turn。
theory is based on practice and in turn serves practice。
10.result in
his carelessness resulted in the accident。
deforestation will result in disastrous ecological changes。