本文通过一个简单模型的严格的宇宙学解说明：真空态的对称性破缺可能是一种宇宙学的效应。
Using an exact cosmological solution of a simple model it is shown that the breaking of symmetry in the vacuum state may be due to cosmological effects.
目前我国大米销售包装常采用抽真空作为保鲜技术，虽然真空包装在对大米的贮藏和销售过程中有一定的保鲜作用，但在流通过程中破袋率较高。
Vacuumizing for domestic rice is adopted, the techniques has the advantages on the storage process of rice, but the rate of the package bags breaking is high in the circulation.
为进一步扩大碱真空脱水技术的应用范围，提高破结构质量，我们在低温条件下?。
Therefore, a new construction technology was formed practically for concrete in the low temperature.
为进一步扩大碱真空脱水技术的应用范围，提高破结构质量，我们在低温条件下?。
Therefore, a new construction technology was formed practically for concrete in the low temperature.
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