元久（1204年二月二十日至1206年二月二十日）是日本的年号之一。后鸟羽上皇实施院政。这个时代的天皇是土御门天皇。镰仓幕府之征夷大将军为源实朝；执权为北条义时。
为了表达对公众习俗和意见的极大尊重，我国政府每年都会策划一系列活动来提升元久登山节的影响力。
To show great respect for the public customs and opinions, every year our government plans a series of activities to promote the influence of Yuanjiu Mountain Climbing Festival.
神经元受损越少，就越有可能尽可能久的保护你拥有的记忆。
The less damage [to] the neurons, the more likely we will be able to preserve what you have for as long as possible.
根据简并态微扰理论和氢原子波函数的性质，得到久期方程中微扰矩阵元的分布规律。
According to the perturbation theory, a distribution law of matrix element in secular equation is discovered in degenerate state and wave function property of the hydrogen atom.
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