?calves是指哺乳動物的幼崽，特別是牛、鹿、羊等的幼崽。它們通常出生后就能站立和走動，但仍然需要母親的哺乳來生長和發育。

calves作為一個名詞，有兩個復數形式：calves和calfs。在英語中，使用calves作為復數形式更為常見。

使用calves的正確場合包括：

1. 描述牛、鹿、羊等哺乳動物的幼崽時，：The calves were grazing in the field.（小牛在田野上吃草。）

2. 描述人類身體部位時，：He has muscular calves from running every day.（他每天跑步，小腿肌肉很發達。）

3. 在農業領域，指種植園中的幼苗或樹木時，：The farmer planted new calves in the orchard.（農民在果園里種植了新的幼苗。）

4. 在海洋生物學中，指鯨類和海豚等哺乳動物的幼崽時，：The mother whale was swimming with her calf by her side.（母鯨帶著她身邊的小鯨一起游泳。）

5. 用于比喻性語境中，指某人的子女或學生時，：The teacher was proud of her calves who all got accepted into universities.（老師為她所有被頂尖大學錄取的學生感到驕傲。）

calves可以作為動詞calve的第三人稱單數形式，意為“分娩”或“產下幼崽”。：The cow calved last night and now has a new calf.（那頭母牛昨晚分娩了，現在有了一個新的小牛犢。）

總的來說，calves是一個非常常見且多義的詞匯，在不同場合下有著不同的含義和用法。無論是指動物還是人類身體部位，都可以用calves來描述。

例句參考：

1. The calves were happily playing in the field, while their mothers grazed nearby.

（小牛們在田野里快樂地玩耍，它們的母親就在附近吃草。）

2. She has been training hard to strengthen her calves for the upcoming marathon.

（她一直在努力訓練，以加強她的小腿肌肉，為即將到來的馬拉松做準備。）

3. The farmer planted new apple tree calves in his orchard, hoping for a good harvest next year.

（農民在果園里種植了新的蘋果樹幼苗，希望明年能有一個好收成。）

4. The mother whale and her calf were swimming gracefully in the ocean, enjoying the warm sun.

（母鯨和她的小鯨在海洋中優雅地游動，享受著溫暖的陽光。）

5. The professor was proud of his calves who all went on to become successful doctors and lawyers.

（教授為他所有成為成功醫生和律師的學生感到自豪。）

隨機例句：

1. The calves were basking in the sun, their soft fur shining under the golden rays.

2. She had a tattoo of a small calf on her ankle, representing her love for animals.

3. The farmer's cows were calving, and he was busy making sure all the newborn calves were healthy.

4. The marine biologist was studying the behavior of humpback whale calves with their mothers in their natural habitat.

5. The coach made his players do calf raises as part of their training routine to strengthen their leg muscles.