它是一场造价高昂的公关活动，一部孩之宝公司的营销机器。

It is an expensive PR event, a big marketing machine for Hasbro.

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中空充钠气门并不是一个全新的概念，但是过去他们造价高昂。

Sodium infill valves are not a new concept, but in the past they have been extremely costly to build.

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太阳能板唯一的问题除了本身造价高以外，太阳板表面也需要设置。

The only problem with solar panels, besides their inherent high price, is the surface area required to set them up.

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