郝曼博士通常带着两打可以随身携带的沙粒样本到课堂上和讲座上。

Dr. Holman keeps about two dozen especially telling samples in a portable “teaching rack” for use in classes and at lectures.

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安格斯是郝曼博士二十年前在陆军工程兵团实验室做研究时开发的。

Argus is the system Dr. Holman developed in research he began about 20 years ago at the Army Corps of Engineers research pier on the coast at Duck, n.c..

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