“滑熟”可以翻譯為 **"smooth and familiar"** 或 **"well-practiced"**，具體取決于上下文：

1. **字面含義（光滑且熟練）**：
- *"The surface is smooth and familiar to the touch."*
- *"He handled the tool with smooth, practiced ease."*

2. **引申義（形容動作嫻熟）**：
- *"Her movements were well-practiced and effortless."*
- *"He played the piece with smooth familiarity."*

如果有具體句子或語境，可以提供更精準的翻譯建議。