It is mainly because that dislocation slides easily within large twin crystal, which leads to the decrease of strength and the increase in plasticity.

主要是位错在大孪晶中易于移动，从而造成强度下降，塑性提高。

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China has already made rapid advances in military jet aircraft and its H-6 large twin-engine bomber, modelled on the Russian Tu-104, can be converted quite easily into a commercial aircraft.

中国已经在军用飞机领域迅速取得进展，以俄罗斯图-104为模型制造的H-6大型双引擎轰炸机，可以很轻松地就改装成商用飞机。

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Then, when I was on a sabbatical in Stockholm, I had the opportunity to get involved with the Swedish Twin Registry, a large cohort study in which some researchers were looking at cognition.

然后，当我在斯德哥尔摩休假时，有机会参与了瑞典的双胞胎人员的登记工作，它是一个大型的队列研究项目，其中的一些研究人员正在着眼于认知的问题。

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The RBI in the past has said that the large twin deficits make cutting rates difficult.

WSJ: India Cuts Policy Rate

Its main use is for troop deployment and its large engine and twin rotors mean it copes better than other models in the heat and high altitudes of Afghanistan.

BBC: Helicopters 'are no magic wand'

The steel and glass entry pavilion will include two large steel columns salvaged from the twin towers.

CNN: Creating 9/11 memorials a slow process