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At the same time, other students in the same class already have the skill down cold, so further practice for them is a waste of time.

同时，同一个班级的其他学生可能已经熟练掌握了这项技能，所以继续练习对他们来说只是浪费时间。

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The experimental research on fluidization characteristic of waste tyre was done in a cold fluidized bed.

在流化床冷态实验台上，对废轮胎的流化特性进行了实验研究。

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In 2009, the company shed weight from its foam hot cup and plastic cold cup which reduced the amount of cup waste winding up in land fills by 4.6 million pounds per annum.

FORBES: Dunkin' Donuts Gets Set To Run On Clean Palm Oil

The appearance of more radioactive soil at Hanford illustrates the difficulties the federal government faces in cleaning up nuclear-waste sites, many of them the legacy of Cold War-era research.

WSJ: Toxic Radioactive Find Adds to Hanford Cleanup Woes