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ǺãƥȱѧеϵĲʿҵ
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ȻΪһ׻
ҾҲ
һĵ
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ĹؼҲ޷

Ϊ
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ƴûе
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ÿһԪ(ĸ)
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Բؽ⡣
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.fs+2

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Ϊмǧͬĳ֣
Ȼñ׼ʼ
Ӣģ

һҲһмǧ
ļڵϡ
й½̨塢
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ѧλӯ˾
ڶ
ѧ
ء
ͳֽ 500
뷨ƴ뷨
뷨ʻ뷨
뷨Խ
뷨籨
뷨λ뷨ȵȡ
ϲиָ
͵У
.sv
.in0
.pm30pt
.in-15pt


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J. B. Wang ()
Pittsburgh, Pa, USA
October, 1989
