Inventor Clarence Birdseye was born in New York in 1886.From a young age，he was interested in animals and plants and in 1906，Birdseye went to college.However，two years later，he （1）l

eft

eft

college for family reasons.Then he took a job and worked for the US government.
    In 1912，Birdseye moved to Labrador — now in Canada.He stayed there （2）u

ntil

ntil

1915.When he was in Labrador，Birdseye watched local people fishing （3）t

hrough

hrough

holes which was cut in an icy lake.As soon as they pulled out fish，the fish at once froze （凍結(jié)）in the very cold （4）a

ir

ir

.He noticed that they could then be kept for a long （5）p

eriod

eriod

.When people wanted some to cat，they could defrost（解凍） them without losing any of the freshness.Birdseye realised that cooling food very quickly was the key to keeping its freshness.This was easy in very cold environments.In（6）w

arm

arm

environments，people had to freeze food slowly.When food is frozen in this way，ice crystals（冰晶），shaped like knives，start to grow inside it.These cut into the food and change the food's cellular structure（細(xì)胞結(jié)構(gòu)） and then its taste.It took Birdseye years to work out how to cool food quickly enough to stop them from growing.Then he began to wonder how this way of freezing might work with fresh （7）v

egetables

egetables

and other food like fish and meat.
    After a lot of efforts，in the late 1920s，Birdseye developed a （8）m

ethod

ethod

to freeze food fast in the US.Later，he （9）i

ntroduced

ntroduced

the first line of frozen food into the market.Frozen food began to be widely accepted.
    Birdseye died in 1956.Today people （10）c

onsider

onsider

him as the father of the modern frozen food industry（行業(yè)）.