A secondary structure in proteins, relatively flat and formed hydrogen bonding between two parallel or anti-parallel stretches of polypeptide.

蛋白质的一种二级结构，相对平坦，在两条平行的或反向平行的肽段之间形成氢键。

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The research results showed that the strength properties of recycled paper were improved mainly by enhancing the bonding properties of the secondary fibers.

研究结果表明，提高纸页强度主要靠改善二次纤维的结合性能。

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It's easy to see the appeal of men's basketball the NBA stars are global celebrities, fans care, TV goes gushy-gushy gaga but as an Olympic moment it's not the pinnacle. (For half of the men's basketball games in London, you needed a pail of cold water over the head at halftime.) With the gold for the U.S. almost assured failure is really the only surprise the intrigue becomes about weird secondary issues, like the team-bonding for the U.S. players.

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