unfound meaning in Chinese

未被发现的
未知的

Aristocratic bouquet , luscious taste set off by a hint of acidity , long finish in the mouth . and it attains silkiness unfound in most a . o . c . whites
酒香高贵，香甜的味道中有一丝酸度，馀韵悠长。如丝般柔滑,为大部份a . o . c .白酒所欠缺的。
Do the positions of the three pyramid images in the crystal hold a key to finding a fourth , as yet unfound subterranean pyramid , that is the fabled hall of records
在水晶球里三个金字塔图像的位置隐藏着找到第四个金字塔位置的钥匙,到目前为止仍然没有发现地下的金字塔,难道真是虚构的霍氏预言