1. I have my hair cut.
    我把头发剪了.

2. Is Kate´s hair long or short?
    凯特的头发是长还是短？

3. I wore a wool hat that concealed my hair and an unfashionable coat and glasses with sun shades that clipped on.
    我戴着一顶把头发掩盖住的羊毛帽子，穿着一件老式的外套、并戴一付夹着遮阳墨镜片的眼镜。

4. Fiber-optic cable, for example — made up of hair-thin glass fibers — is a tremendously efficient carrier of information.
    例如，光纤电缆 -- 由细如发丝的玻璃纤维制成 -- 是一种极为高效的信息载体。