难点在于，W和Z都是重粒子。
之所以需要高能量是因为希格斯粒子被认为非常重。
And high energies are needed because the Higgs is thought to be quite heavy.
高能重离子碰撞开辟了研究多粒子体系的新领域。
The high energy heavy-ion collisions open a new field in nuclear physics.
高能重离子碰撞开辟了研究多粒子体系的新领域。
The high energy heavy-ion collisions open a new field in nuclear physics.
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