它所开创的新时尚是一种“双向渗透”传播模式，是一场基于弱链接基础上的“元”传播；
Finally, we came to the conclusion that this new vogue is a "double-round " model , a kind of meta-communication based on weak link.
它使身体呼吸：双向拉伸防水和蒸汽渗透盖使用。
It allows the body to breath: A two-way stretch waterproof and vapour-permeable cover is used.
美国学校德育具有注重双向互动、注意教育的层次性、渗透性、实践性等特点，对搞好我国的德育教育很有启示，值得我们借鉴。
American school value interaction between teachers and students, moral and ethical education at various levels and in practical ways, which deserve our references.
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