sand laboratory的意思|示意

So far, star sand has only been grown in the laboratory.

目前为止，星沙只能在实验室里培育。

Some even have laboratory, technical personnel's knowledge of artificial can not adapt to the present situation is the master and correct use of sand.

有的即使有实验室，技术人员的知识现状也不能适应对人工砂的掌握与正确使用。

In this raper, a model of continuous wall inserting in sand with a thin layer of grease as a slide surface has been loaded laterally in laboratory.

本文在模型实验基础上，采用有限元方法，对砂、软弱夹层和连续墙三种材料的组合结构进行了非线性分析。