Web [1] is exemplified by e-commerce shopping carts, enabling two way interaction between business and consumers.

Web[1]允许商家和用户之间的双向互动，电子商务购物车是它的典型特征。

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The therapist and other experts observe the interaction through the two-way mirror while cameras and microphones record everything.

治疗师和其他专家通过双向镜观察互动过程，同时摄像机和麦克风记录下所有细节。

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They also get a double benefit, because their interaction is two-way.

他们也得到双倍的收益，因为他们的交流是双向的。

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So, two-way interaction.

所以这是种双向互动

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An illustration of a telephone talking to a fax machine left him none the wiser, nor the idea that "storing results of a two-way interaction to a central location" was something that his applications had copied from the American firm.

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