The underground chamber remained a secret for nearly 1, 600 years, until an archaeologist noticed rectangular patches of soft clay in the pyramid's floor—a telltale sign of a grave.
这地下墓室的秘密尘封了近1600年之久，直到一位考古学家发现了在塔内地面上的矩形软土——它泄露了墓穴的秘密。
Later, he poured liquid rubber into the clay impressions, creating soft casts of their fingertips.
然后他将液体橡胶倒入黏土印子，创造出客户指尖的模子。
A tall, soft-spoken Mormon academic at Harvard Business School, "Clay" Christensen (born 1952) sprang to prominence on the strength of one book, "the Innovator's Dilemma".
1952年生的克里斯滕森是个个子高高、轻声细语、信奉摩门教的哈佛商学院教授，凭借《创新者的窘境》一书而声名大噪。
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