They had a mail service, although it was for official use only.

建立了邮政系统，虽然只供官方使用。

Such factors of instability, not only by the database system itself or caused side, the official use only, as the flow of users increases, will gradually revealed.

这类不稳定因素，不单单由数据库或者系统本身一方引起，只有系统正式使用后，随着流量、用户的增加，才会逐步显露。

While all essential content is available in the six official languages, technical content - with the intention of rationalizing the use of resources - is deliberately published only in some languages.

所有重要内容均以六种正式语言发表，同时，为合理使用资源，技术性内容只以某些语言公布。

These questionnaires were used only for screening purposes, the study notes, and were not equivalent to the official symptom checklists doctors use to diagnose depression.

调查也指出，所有问卷都比较“委婉”，跟医生用来诊断抑郁症的官方版检测表不一样。

BlackBerry phones are much like iPhones in the fact that you can only use BlackBerry OS with an official phone by BlackBerry.

你只能在黑莓手机上使用黑莓操作系统，这点与iphone类似。