They had a mail service, although it was forofficialuseonly.
建立了邮政系统，虽然只供官方使用。
2
These questionnaires were used onlyfor 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。
3
The consular bag may contain onlyofficial correspondence and documents or articles intended for official use and must be sealed and bear visible external marks of its character.