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- During estrus, the female is fertile and will accept a male. 在发情期，母犬可以接受交配并且具有生育能力。
- There are fertile fields in the Nile Delta. 尼罗河三角洲土地肥沃。
- fertile estrus 可育性发情
- The plains of Alberta are extremely fertile. 艾伯塔平原极其肥沃。
- Most chicken eggs are not fertile. 多数鸡蛋未受精。
- The fields hereabout are fertile. 这一带的土地很肥沃。
- A cow's estrus cycle averages 21 days. 母牛的发情周期平均为21天。
- The country is barren, with here and there a fertile spot. 土地荒芜，只是偶尔有一两片沃土。
- Not fertile; unproductive or barren. 不肥沃的不肥沃的; 不生产的或贫瘠的
- The rotation of crops keeps the soil healthy and fertile. 谷物轮种使土壤保持了肥力和高质。
- Of, relating to, or being in estrus. 动情期的，求偶期的动情期，与动情期有关的或处于动情期的
- The barren land has been turned into fertile fields. 贫瘠的土地已改成良田。
- They drained the swamp and turned it into fertile land. 他们排去沼泽地的水，将它变成了肥沃的土地。
- The land is so fertile that three crops a year can grow. 这片土地很肥沃,一年可种三季庄稼。
- We have irrigated the desert area to make it fertile. 我们已经灌溉了荒芜地区使它肥沃。
- Estrus: During this period, which also lasts approximately nine days, the female will accept the male and is fertile. 发情期：这段时期，同样持续约九天，母犬可以和公犬进行交配并受孕。
- Dark, fertile soil containing decaying vegetable matter. 腐殖土含有腐坏的蔬菜等物质的黑而肥沃的土壤
- That district is fertile in wheat. 那个地区盛产小麦。
- The period of sexual inactivity that follows estrus. 后情期动情后的性不活跃期
- A fertile imagination; a fertile source of new ideas. 丰富的想象力; 新思想的丰富源泉
