Bamboo is arguably the greenest building material on Earth.

竹子可以说是地球上最环保的建筑材料。

For bio fabric company Bolt Threads, greener materials come from an unusual source.

对于生物纤维公司的螺栓螺纹，更环保的材料有不同寻常的来源。

More—one evening she went up to the east gable with her arms full of a delicate pale green material.

还有——一天晚上，她怀里抱着一件精致的淡绿色布料，上了东山墙。

I found: first, a fragment of green material; second, a stain on the carpet near the window, still damp; thirdly, an empty box of bromide powders.

我发现：第一，绿色材料的碎片；第二，靠近窗户的地毯上有污渍，仍然潮湿；第三，一盒空溴化物粉末。