种试验田的经验，值得普遍推广。
The cultivation of experimental plots is an experience worth spreading everywhere.
沃姆·林克告诉记者，美国航天局在亚利桑那的沙漠中找到一种和月球土壤类似的沙子用做试验田，而火星红“土”采自夏威夷的一座火山。
The US space agency makes ground similar to that on the Moon from sand found in an Arizona desert, while Mars' crimson "soil" is scooped from a volcano in Hawaii, Wamelink told reporters.
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