我们已经完成了初步的调查工作。

Wǒmen yǐjīng wánchéngle chūbù de diàochá gōngzuò.

We have completed the preliminary investigation work.

这是我们初步的计划草案，请大家审阅。

Zhè shì wǒmen chūbù de jìhuà cǎo'àn, qǐng dàjiā shěnyuè.

This is our preliminary draft plan, please review it.

新产品已经初步设计完成。

Xīn chǎnpǐn yǐjīng chūbù shèjì wánchéng.

The new product has been preliminarily designed.