和传统信件相比，电子邮件有很多优点，如速度快，不需花钱。
Compared with traditional letters, e-mails have many advantages, such as fast speed and free of charge.
此方法具有运算速度快，计算精度高和校正特性好等优点。
This method has much advantage such as fast operation, high computing precision and good correcting property.
它具有沉积速度快和表面清洁的特点，特别具有膜层附着力强、绕射性好、可镀材料广泛等优点。
It has a fast deposition rate and surface cleaning features, in particular strong adhesion with the film, diffraction, and can be coated material widely and so on.
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