国家美术馆正在举办一场令人惊叹的澳大利亚风景画展。

The ___NGA is hosting an amazing exhibition of Australian landscape paintings.

国家地理空间情报局为军事行动提供卫星图像分析。

The ___NGA analyzes satellite images for military operations.

这款音响系统采用NGA技术，提供卓越的音质。

This sound system uses ___NGA for superior audio quality.