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题库 / Prep2007E1-SC-42
As a result of a supernova explosion, every human being on Earth was bombarded on February 23, 1987, by about 100 billion neutrinos; fortunately, neutrinos are harmless elementary particles that are produced in nuclear reactions and that interact very weakly with matter.
neutrinos are harmless elementary particles that are produced in nuclear reactions and that
neutrinos, which are harmless, are elementary particles produced in nuclear reactions and which
neutrinos are harmless elementary particles produced in nuclear reactions and which
these harmless elementary particles are produced in nuclear reactions, and neutrinos
these elementary particles, harmless products of nuclear reactions, are neutrinos that
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句子之间的逻辑转折关系应该体现在句子的主干成分中，而不是在修饰成分上。
every human being on Earth was bombarded by about 100 billion neutrinos; 随后分号后面的fortunately想要表达的意思是虽然遭到这么多粒子的轰炸，但是影响并不大因为这些粒子是无害的。
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