On the bottom, an 8 inch or 20 centimeter layer of sand was placed, then what's referred to as a geotextile layer, —a form of fabric—then a layer of waterproof plastic, then another geotextile layer, then another layer of sand.

在底部，放置了层 8 英寸或 20 厘米厚沙子，是所土工织层， 种织形式， 是层防水塑料， 是另层土工织，是另层沙子。

The Presena Glacier, in Italy, gets  covered in ten thousand sheets of geotextile, laid out by a crew of eleven people using two  snowcats and a lot of rope, harnesses, and crampons.

意大利普雷塞纳冰川被万片土工布覆盖，这些土工布由十人团队使用两辆雪地车和大量绳索、安全带和冰爪铺设。