In the primary stages of their civilization, they had no metal tools.

在他们文明的最初阶段没有金属工具。

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The most basic primary school English as a foreign language education, with special teaching object - is in the primary stages of learning their mother tongue.

小学英语作为最基础的外语教育，有着特殊的教学对象——正处在母语学习阶段的小学生。

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At present, the focuses are archaeological research, regional study, and periodical division, which are primary stages. It has not got the level of synthetic study.

目前，对它的研究还处于田野考古学研究、区域研究和分期断代研究这样的基础研究上，还没有上升到综合研究的层次。

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The comical, witty and very well-acted production by Primary Stages opened Tuesday night at 59E59 Theaters.

WSJ: Review: 'All in the Timing' has wordplay and wit

Primary Stages, which produced the plays in 1993, is once again mounting them, this time at 59E59 Theatres.

WSJ: Playwright David Ives finds his timing perfectly

The world premiere, a touching and intelligent co-production by Playwrights Horizons and Primary Stages, opened Sunday night at Playwrights Horizons.

WSJ: Review: 'The Call' is a touching adoption saga