我们故意把这种墨水保持低浓度，并把它置于精确控制的温度下外露于空气中，这样流体上表面破浪地方的黄金颗粒就能得到浓缩。
The ink was kept deliberately thin and exposed to air at a precisely controlled temperature, which concentrated the gold particles at the curved upper surface of the fluid.
胶州湾周围河流中上述污染物浓度远远高于湾内，其中墨水河污染最严重。
The phenolic pollution in the adjacent rivers is much more serious than within the Bay and the Moshui river is the most seriously polluted.
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