单词:capstan PWM generator
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It's a sunny day. Oxygen in the water increases and the fish crowd together. 今天阳光明媚。冰下的含氧量提高,鱼群的密度会很大。 A 2,000-meter fish net quickly sinks to the bottom. 长达两千米的渔网很快沉入水底。
注释: Security Council 安理会 unanimously [ju(:)5nAnimEsli] adv. 全体一致地 nuclear [5nju:kliE] adj.(核)核子的,原子能的 score [skC:] vt. 获得 diplomatic [7diplE5mAtik] adj. 外
1. Washington is buried under a heavy blanket of snow. Roads are mostly impassable. President Obama has called the storm Snowmageddon. 2. Despite the blizzard, some people in D.C. did venture outside for a chance to play. Snowballs were flying in nor
Bladeless Wind Generator Safe for Birds Wind turbines are tall structures with large blades used to produce electricity. They are useful sources of low-cost, renewable energy. But they can also be deadly to birds and bats. The turbines large blades t
Powell Defends US Stance on Iraq's WMD Nick Simeone The Bush administration is coming under renewed attack over whether its claim that Iraq possessed weapons of mass destruction was backed up by solid
A congressionally-mandated U.S. commission has released a report warning of a possible nuclear or biological attack somewhere in the world within five years. The report singles out Pakistan as the top security priority for the United States. VOA's D