calving date

例句：

1. 1. The calving date for the new bull is set for next month.
   新公牛的配种日期定在下个月。
2. 2. The farmer has to calculate the calving date based on the weather forecast.
   农民必须根据天气预报来计算配种日期。
3. 3.The calving date is crucial for determining the health of the cows.
   配种日期对于确定奶牛的健康至关重要。