A cohesive arch occurs when particle-to-particle bonds form, allowing the material to pack together and obstruct flow.

当形成粒子对粒子的粘连，从而使材料粘成一体并阻碍流动时，粘连弧形就出现了。

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The US Postal team leader's position was never threatened during the 155km race, as he remained within the pack together with his closest challengers.

美国邮政车队的当家车手阿姆斯特朗在155公里的赛程中没有受到任何威胁，他始终与积分离他最近的对手们混战在同一方阵中。

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For instance, the way the material behaves could be changed by adjusting the size of the nanoparticles, the ratio of their sizes, and the way they pack together.

ECONOMIST: MONITOR

However, the last two quarters of 2010 is shaping up to be a better year than many expected for large-cap companies, leading to 12% returns in several mutual funds that pack together these stocks.

FORBES: High Quality Stocks for Volatile Markets

Because newspapers pack together all sorts of different content, many of those who claimed in the past to have seen some news probably did so for a few seconds before turning the page to the sports scores.

ECONOMIST: Media