發送短信

數:

提供者:

CAPTCHA:

 _    _      ___       _____   __   __   _    _   
| \  / ||   / _ \\    / ___//  \ \\/ // | \  / || 
|  \/  ||  / //\ \\   \___ \\   \ ` //  |  \/  || 
| .  . || |  ___  ||  /    //    | ||   | .  . || 
|_|\/|_|| |_||  |_|| /____//     |_||   |_|\/|_|| 
`-`  `-`  `-`   `-` `-----`      `-`'   `-`  `-`

Please enter what you see:

發送短信 : Strong violet and green-yellow electroluminescence from silicon nitride thin films multiply implanted with Si ions