The period of replacement heifers is the key stage of dairy raising .
后备牛时期是奶牛养殖的关键阶段。
Taking the 75 t/h boiler control system as an example,some problems relating to the PLC-5 backup communication technique were stated in detail,such as the hardware installation .
详细地阐述了与ＰＬＣ－５的硬件安装、后备系统工作流程、软件设计及后备程序调试等有关的后备技术问题，从而有效地避免了ＰＬＣ硬件系统故障造成的控制过程中断，实现了利用后备（冗余）通讯技术，进行连续，不间断的过程控制。
The paper introduced a case of main transformer backup protection tripping and analyzed problems in the accident.
针对一起主变后备保护跳闸,由于运行人员处理不当,造成事故扩大的原因进行分析,并就暴露的问题展开深入分析研讨,制定出相关问题的防范措施。
Study on Energy Requirement and Metabolism of Heifer Dairy Buffaloes;
后备母水牛能量需要及其代谢规律的研究
Effects of Antifreeze on Parthenogenetic Development of Buffalo Vitrified Oocytes
抗冻剂对水牛卵母细胞冷冻后孤雌发育的影响
Studies on the Different Expressing Genes in Buffalo Immature and Matured Oocytes;
水牛卵母细胞体外成熟前后基因差异表达的研究
The farmer let out the cows after milking.
农夫挤完牛奶以后，就把母牛放出去了。
Effects of Energy Sources and Levels in Diet on Oocyte Quality and Gene Expression in Gilts;
能量来源和水平对后备母猪卵母细胞质量及相关基因表达的影响
Female water buffaloes are excellent mothers.
母水牛是非常称职的母亲。
Relationships of Milk Production of Beef Cows to Postweaning Gain of Their Calves;
母牛产奶量与断奶后犊牛日增重关系的研究
After that, seven thin cows came up from the water and ate up the seven fat cows.
之后，又有七只瘦母牛由河中上岸吃掉那七只肥母牛。
Hence a writer feels a maternal affection toward his literary product as a mother feels toward her baby.
发表之后，又自诵自喜，如母牛舐犊。
Effects of Different Energy Levels and Sources Body Composition, Age of Puberty and on Estrus Ratio of Gilts;
不同能量水平和来源对后备母猪体成分、初情日龄和发情率的影响
"and they are to take the cow into a valley where there is flowing water, and which is not ploughed or planted, and there the neck of the cow is to be broken:"
把母牛犊牵到流水，未曾耕种的山谷去，在谷中打折母牛犊的颈项。
Study on Vitrification of Buffalo Oocytes;
水牛卵母细胞玻璃化冷冻保存的研究
Maternal Origin and Genetic Diversity of Chinese Domestic Buffalo;
中国水牛遗传多样性与母系起源研究
Effects of three Types of Vitrified Solutions on in Vitro Development of Vitrified-Thawed MII Oocytes in Buffalo
3种玻璃化冷冻液对水牛MII期卵母细胞冷冻-解冻后体外发育的影响
Of, relating to, or resembling a ruminant mammal of the genus Bos, such as an ox, cow, or buffalo.
牛科动物牛属的反刍哺乳动物的、与之相关的或类似之的，如公牛、母牛或水牛的
A young cow or bull.
小牛年幼的母牛或公牛
motherless calf in a range herd of cattle.
牛群中失去母牛的小牛。
Research on Enzymatic Hydrolysis of Waste Beer Yeast for Preparation of Beef Flavor by Maillard Reaction;
啤酒酵母的酶解及Maillard反应制备牛肉香精的研究