例句與造句

1. The disease , low quality of embryo , semen contamination , breeding out of time , low quality of recipient , not synchronous estrus between donor and recipient , antiquated preserve to embryo , hereditary unsoundness , accidental injury by medicament , vaccination , feeding and management to depart from science , immunological reaction and multiple embryo in uterus are the more important factors
   這些因子主要包括疾病、胚胎質(zhì)量差、精液污染、不適時(shí)配種、受體羊質(zhì)量差、供受體羊發(fā)情不同步、胚胎保存時(shí)間長、遺傳缺陷、誤用藥物、接種疫苗、飼管不科學(xué)、免疫反應(yīng)、子宮內(nèi)多胚等。
2. It's difficult to find synchronous estrus in a sentence. 用synchronous estrus造句挺難的