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n. [解]索；腱（等于chorda）；带
n. 杂务；零工；困难的工作（chore的复数）
The NEOP has identified 95% of asteroids of this most dangerous order, Chodas said.
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"The smaller ones may not be seen until a week, or days before impact, " Chodas said.
CNN: Scientists reduce odds of Earth-asteroid collision
Any asteroid as large as a half-mile across would cause a global catastrophe, if it struck the blue planet, Chodas said.
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