求翻译：主要从事畜牧技术示范、推广以及科技管理工作 主要参加了“良种肉牛及配套饲养技术”、“节能式畜牧舍及其配套技术研究”、“良种猪饲养及加工技术”、“良种肉鸡及配套饲养技术”、“猪人工授精技术推广”等14项研究与推广项目的工作，其中，2项为主持人，其余为主要参加人。是什么意思？

Mainly engaged in animal husbandry and technology demonstration, promotion of science and technology management to participate in a "fine beef cattle and supporting feeding techniques, energy-efficient animal husbandry Scotia and its supporting technology, seed pig breeding and processing technology

Mainly engaged in animal husbandry techniques, as well as science and technology promotion model, primarily in the management of the thoroughbred cattle and companion animal husbandry skills" and "energy-saving-livestock buildings and its companion technologies research", "seeds" pig breeding and pr

Mainly was engaged in the raising livestock technology demonstration, promoted as well as the science and technology supervisory work mainly participated in “the improved variety beef cattle and the necessary raising technology”, “the energy conservation type raising livestock shed and the necessary

Main engaged in livestock technology model, and promotion and technology management work main participate in has "varieties beef and the supporting feeding technology", and "energy-saving type livestock homes and supporting technology research", and "varieties pig feeding and the processing technolo