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。

youdao

A Mass of simple ceremony that was recited rather than sung by the priest. No longer in official use.

平时小弥撒：简单仪式的弥撒，是由牧师背诵而不是唱出来的。现在不再被正式使用。

youdao

A written commitment that the property purchased by an overseas institution is for the actual official use.

境外机构所购房屋是实际办公所需的书面承诺。

youdao

Susan Martimo,a California Department of Education official,says she does not expect widespread use right away.

VOA: special.2009.08.27

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。

耶鲁公开课 - 新约课程节选

You are allowed to use on the test the official version of the Periodic Table of the Elements which most of you should have by now.

在测试中你们可以使用,化学元素周期表的官方版本,你们应该大部分都有了吧。

麻省理工公开课 - 固态化学导论课程节选

Instead it insists to get an eight-digit number labelled "official use" on the hard copy.

BBC: Taxing internet returns

Mazzanti expects the Army will anoint two mobile operating systems for official use.

CNN: U.S. Army may soon equip troops with smartphones

In 2008, following a long debate among judges, he modelled a simplified judicial robe which is now in official use in the civil courts.

BBC: Profiles: UK Supreme Justices