ALS is caused by the degeneration and death of motor neurons, the nerve cells which convey nerve impulses from the spinal cord to each of the body's muscles.

ALS是由运动神经元的变性和死亡而发生的，该运动神经元可将神经冲动从脊髓传达到身体的各块肌肉。

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The leading cause of death for firefighters often caused by asphyxiation and burns (20%), motor vehicle collisions (20-25%), trauma (27%) and heart attack (44%).

导致消防员死亡的最主要原因通常是窒息和烧伤(20%)、汽车相撞(20 - 25%)、创伤(27%)和心脏病(44%)。

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Conclusions: Peripheral nerve injury can induce spinal cord anterior horn motor neurons dead, and the neuron death demonstrates its own character.

结论：大鼠坐骨神经损伤后，脊髓前角运动神经元的胞体有死亡，其死亡具有一定的时间特征。

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When the U.S. Supreme Court decides a case against Mazda Motor of America Inc. over a death allegedly caused by the lack of a shoulder strap in a minivan, it could put automakers on the hook for a wide range of state law claims that courts have long deemed preempted by federal regulation, experts say.

FORBES: Mazda Preemption Case Could Expand Automaker Liability

Motor vehicle collisions remain the leading cause of death for individuals between the ages of three and 34.

FORBES: The Safest Small Cars

More than 3, 400 teens died in motor vehicle crashes in 2009, but that death toll is 60% percent less than in 1975, according to the safety group.

CNN: Teen girls take more risks behind wheel, study finds