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drug prevention
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drug prevention
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drug prevention
毒品预防
通过各种有效途径让人们了解和认识毒品问题的成因和毒品的有关知识,提示毒品对个人、家庭、社会的巨大危害,提高全民尤其是青少年认知毒品、拒绝毒品的能力,构筑全社会防范毒品侵袭的有效体系的过程。
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semigroup of contraction operators
semigroup of endomorphisms
semigroup of finite breadth
semigroup of finite rank
semigroup of holomorphic mappings
semigroup of idempotents
semigroup of isometries
semigroup of kernels
semigroup of left zeros
semigroup of linear operators
semigroup of nonlinear operators
semigroup of operators
semigroup of polynomial growth
semigroup of quotients
semigroup of right zeros
semigroup of shifts
semigroup of transformations
semigroupoid
semigroup property
semigroup quasi-regular on the left
semigroup quasi-regular on the right
semigroup ring
semigroup stationary on the left
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semigroup theoretic
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