underlayer的翻译，读音
英/'ʌndә,leiә(r)/
释义：
n. 下层, 底层,衬层
n. One who, or that which, underlays or is underlaid; a
lower layer.
n. A perpendicular shaft sunk to cut the lode at any
required depth.
n. One who, or that which, underlays or is underlaid; a
lower layer.
n. A perpendicular shaft sunk to cut the lode at any
required depth.