空怀 meaning in English

[牧] nonpregnant; barren

I bring to thee , night , my day ' s empty cup , to be cleansed with thy cool darkness for a new morning ' s festival
幽夜啊，我为你带来白昼之空怀，为了佳节的弥新之晨，用你清凉的黑暗涤净它吧。
The sows , which are not pregnant , are vaccinated by hcv vaccine of different dose and then detected antibody against hcv with ppa - elisa at different time
给空怀母猪接种不同剂量的猪瘟兔化弱毒疫苗，分别于不同时期用ppa - elisa检测血清抗体。