The workshop director introduced a worker and engineer to us.

车间主任把一位工人工程师介绍给我们。

The workshop director introduced a worker and an engineer to us.

车间主任把一位工人和一位工程师介绍给我们。

Workshop director of high-strength comrades wholeheartedly welcome customers to negotiate business.

车间主任高强同志竭诚欢迎广大客户前来洽谈业务。