As game becomes an increasingly important means in teaching, the boundary between study and playing has already been blurred.

随着游戏成为教学中越来越重要的手段，学习和游戏之间的界限早已模糊了。

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The boundary between the internal and external network has blurred over the years.

近年来，内部网络和外部网络的边界变得模糊。

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The boundary between sculpture and installation is gradually blurred, which makes the forms of presentations broader.

雕塑与装置的界限正逐渐弱化，这使得雕塑的表现形式更为宽泛。

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Social networking is spreading out of schools and colleges into companies, big and small, and as that happens the boundary between the personal and the professional is being blurred.

BBC: NEWS | Technology | Meet the digital biographer