我们用测试语气拨打了一个号码然后开始覆盖住手机(PS：我们不确定那个电话是免费的，但是我们还是冒险了)。
We called a line with a test tone and started covering up the phone (note, we cannot be sure this line is toll free, but we risked it).
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。
They then coated the template with ink made of flecks of gold just 60 nanometres in diameter suspended in an aqueous solution.
雪用她厚重的白色外衣覆盖住草地，霜降给所有的树木刷上了银色的外衣。
The Snow covered up the grass with her great white cloak, and the Frost painted all the trees silver.
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