也就是说n维欧式空间中两个随机向量应该是“ 几乎必然”（almost surely）不垂直的。用常识想一下，n维空间中两随机向量之间的夹角 θ，应该是遵从一个连续概率分布的。
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... almost surely convergent 殆必收敛的 almost surely 殆必 almost triangular matrix 准三角形矩阵 ...
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Convergence almost surely 强机率收敛
almost surely convergence 收敛 ; 强收敛
convergence rate almost surely 收敛速度
converge almost surely to X 几乎处处依概率收敛到X
almost surely bounded linear operators 几乎处处有界线性算子
以上来源于: WordNet
If elite schools have relaxed standards, the practice is almost surely widespread.
如果精英学校放宽标准，这种做法几乎可以肯定是普遍存在的。
In fact, it almost surely raises them by adding a layer of middlemen.
事实上，由于增加了一中介层，几乎可以肯定地说，医保费用会升高。
The continent will almost surely experience a deceleration in growth.
该大陆几乎肯定会发生增长减速。
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