Exports are important to the economic health and vitality of american poultry producers 出口对美国家禽生产业保持兴旺和活力十分重要。
2.
An increase in the metabolisable energy and improvement in feed conversion are important factors for poultry producer 对于家禽饲养者而言，代谢能的增加和饲料转化率的改善是相当重要的因素。
