Here they endure long hours at dangerous jobs, wringing flecks of gold from the dirt with mercury.
他们每天在这种危险的环境下工作很长时间，从带有水银的泥沙中淘出金沙。
They then coated the template with ink made of flecks of gold just 60 nanometres in diameter suspended in an aqueous solution.
接着，研究人员用一种特殊的墨水覆盖住，而这种墨水是由直径仅60纳米的黄金微粒悬浮于水性溶剂而构成的。
If you salt the slurry with buck shot and swirl the pan around, the dark pellets will track the elusive flecks of gold.
如果你在沙砾中加上撒上盐，把它晃一晃，那些黑色的小球中就会显现出不易发现的小块金子。
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