正副总经理（或正副厂长）由合营各方分别担任。

The president and vice-president(s) (or the general manager and assistant general manager(s) in a factory) shall be chosen from the various parties to the equity joint venture.

一般在兔毛纤维横截面上正副皮质不呈双边分布。

In general, the distribution of ortho - and para-cortex is not bilateral in cross section of the rabbit hair.

有时候正副驾驶都专心于操作电脑，结果没人留意机窗外可能出现的状况。

Sometimes both pilots would get engrossed in trying to operate the computer, leaving nobody looking outside the Windows for possible conflicting traffic.

学术论文篇名的结构主要有三种类型：短语型篇名、冒号型篇名、正副标题型篇名。

As far as structure is concerned, titles of academic dissertations fall into three types: "phrase" type, "colon" type, and "title-subtitle" type.