For diving there's small sealed tank inside, the negative tank.
为了下潜，里边还有个密封小水槽—负槽。
Working principle: piston moves from left to right, form a negative pressure pump cylinder, the liquid tank into the pump by the inhalation valve cylinder.
工作原理：活塞自左向右移动时，泵缸内形成负压，则贮槽内液体经吸入阀进入泵缸内。
A poll released this week by the Levada Centre, a think-tank in Moscow, shows that 74% of Russians have a negative view of America, the highest number in Russia's post-Soviet history.
本周，一个在莫斯科的智囊团列瓦达中心公布的一项民意调查显示，74%的俄罗斯人对美国有着负面看法，这个人数在俄罗斯的后苏联历史上是最多的。
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