Recently, Steve Cummer, Associate Professor of Electrical and Computer Engineering at Duke University announced that it is theoretically possible to create such a sound shield.

近日，杜克大学电子信息工程学院副教授Steve Cummer声称，从理论上这种声音屏障是可造的。

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Shield tunnelling through a mix ground has been always one of hard points annoying much the underground engineering community.

复合地层的盾构施工一直是困扰地下工程的难题之一。

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Conservatory measures of three-tube parallel shield tunnel of subway approaching constructed in Mollisol have been brought forward, which have some reference value to the same kind of engineering.

提出了软土地铁三管并行盾构隧道近接施工的一些防护控制措施，对于同类的工程具有一定的参考价值。

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Several models have been put forward as to how such a feat of "geo-engineering" might actually be achieved, most involving the positioning of a reflective shield of some sort out in space.

CNN: The shield of Ra: Could solar reflection save the planet?