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[00:04.00]flight [00:06.22]n.飞翔,飞行;航班;航程;楼梯的一段 [2]逃跑,溃退 [00:08.44]fling float flock [00:11.62]vt.(用力地)扔,抛,丢 v./n.漂浮,浮动 n.(禽,畜等的)群;大量v.群集,成群 [00:14.81]flood floor [0
Unit 11 Edward and His Incredible Black Hole177 爱德华和他那难以置信的黑洞 小时候,最吸引人的童话故事或者动画片总是与星空和宇宙有关。很多人在童年里都做过飞上太空﹑探索宇宙的梦想。爱德华将梦想付诸实施,虽然其结局是悲惨的,但谁能说,他的科学探索精神不
Thank you very much. Its a privilege and an honor to be in the white intellectual ghetto of the West. We wanted to do a couple of things before we started. The first is that, based on the fact that SNCC, through the articulation of its program by it
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
RAY SUAREZ, HOST: After Harvey and Irma, the hurricane season wasn't over. Hurricane Maria made landfall on Puerto Rico as a massive Category 4 storm. Months later, the power supply is still spotty, and thousands of homes still rely on generators. Da
JUDY WOODRUFF: Next: the possibilities of getting more energy through water. Humans have long harnessed the power of water to perform work. In modern time, hydroelectricity, generated by the power of water flowing through turbines at the base of dams