The speed with which an option loses value is called time decay, which becomes steeper as the expiration nears.
期权失去价值的速度叫时间衰减，越接近到期日，衰减越快。
The Strategy for inhibiting the malicious recommendation is given and the time decay of trust is discussed.
同时给出了抑制节点恶意推荐的策略，讨论了信任的时间衰减。
The Strategy for inhibiting the malicious recommendation is given and the time decay of trust is discussed.
同时给出了抑制节点恶意推荐的策略，讨论了信任的时间衰减。
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