Five for silver, six for gold.

五代表银子，六代表金子。

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Five-nanometre gold particles, for example, look red, and silver ones look yellow.

例如，五纳米的金粒子呈现红色，银粒子呈黄色。

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The colour comes from the light that remains unabsorbed. Five-nanometre gold particles, for example, look red, and silver ones look yellow.

光中的颜色仍然未被吸收，例如5毫微米的金粒子呈红色，而银离子呈黄色。

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Smith improved over rounds four and five but the Commonwealth Games silver medallist from 2002 looked to be heading for defeat at the half-way stage with Quigley picking him off with a combination of upper-cuts and jabs.

BBC: Smith beats Quigley in thriller

The women's side, including five-time FIFA World Player of the Year Marta, had to settle for silver for the second straight Olympics.

CNN: Golden goal: Can boys from Brazil achieve Olympic dream?

Overall, it was a good day for British runners with a best-ever tally of four gold, five silver and three bronze medals.

BBC: Farah misses out on European gold