气晖观测是研究中层顶区动力过程的重要方法。

Airglow measurement is an important method of studing the dynamic processesin the mesopause region.

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并在气顶区、油气界面及油区建立了一套观察系统。

For this, a set of observation system is set up in gas cap zone, gas-oil contact and oil zone.

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结果表明，倒生的棉花胚珠可以分为合点区、株柄顶区、腰区和珠孔区。

The results showed that ovule surface might bedivded into the chalazal zone, crest zone, middle zone and the micropylezone.

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