Gold is spun into thread .

把黄金拉成细丝。

Instead, their test tube was filled with some "contaminant": A high molecular weight polymer they would soon identify as the first actin-binding protein, later called filamin A.

另，他们的试管充满了些“污染物”：种他们即将鉴别的，相当于第个肌动蛋白结蛋白的高分子质量的聚物，后来被称为细丝蛋白A。