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BobbiWailes
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1.
Bobbi Wailes
developed
polio
before
a
vaccine
became available
in
the
nineteen
fifties
.
BobbiWailes
在
19世纪50年代
疫苗
开发
出来
之前
患上
了
小儿麻痹症
。
BobbiWailes
zài
shí jiǔ shì jì wǔ shí nián dài
yì miáo
kāi fā
chū lái
zhī qián
huàn shàng
le
xiǎo ér má bì zhèng
。
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