They are artificially inseminated to produce a calf and start their milk production .
它们将接受人工授精产下一头小牛,然后开始产奶过程。
In the darkness of night two rhinoceros approached the water-hole , a mother and her calf .
在黑暗的夜晚里,犀牛走近水池,一头母牛和她的小牛。
But fashion watchers noted at the end of last year that designers now favor denim that 's looser around the calf and flares out slightly toward the foot .