Your best storage method depends on the type of e-mail account you have, and on your personal preferences. 最佳存储方法取决于您的电子邮件帐户类型以及您的个人偏好。
The underground salt cavity created by solution mining used for storage has great advantages over other storage methods. 利用水溶开采技术建造的地下岩盐溶腔用于存储与其它存储方法相比具有很大的优势。
