形容头发顺滑怎么说英语

To describe hair as smooth in English, you can say that it is "silky," "smooth as silk," "smooth and shiny," or "smooth to the touch." You could also say that it is "sleek" or "well-groomed." Here are a few examples:

"Her long, black hair was so silky and smooth, it almost seemed to glow in the sunlight."
"His hair was so smooth and shiny, it looked like he had just stepped out of a salon."
"She ran her fingers through her smooth, straight hair and smiled."
"His hair was sleek and well-groomed, a sign of his attention to detail."