问了一下Grok, 童子鸡为：

"童子鸡" in English is "spring chicken" or "young chicken." It typically refers to a young, tender chicken that hasn’t fully matured, often used in cooking. In some contexts, especially informal ones, "spring chicken" can also mean a young or inexperienced person, depending on how it’s used.

For example:

• 烹饪上： "A dish made with spring chicken"（用童子鸡做的菜）。
• 俚语用法： "She’s no spring chicken"（她可不是小丫头了，意指年纪不小了）。