No air bubbles were present in the green ice, suggesting that the ice was not formed from the compressionof snow but instead from the freezing of seawater.
绿色冰层中不含气泡，这表明了这种冰层是由冻结的海水形成的，而不是凝结压紧的积雪。
2
This is the first unit in support of the new MPACT Pure AirCompression Technology systems development program.
这是第一个支持新式MPACT纯空气压缩技术系统开发计划的单元。
3
The upper portion of the air intake is incorporated with an intake ramp designed to generate a rearward leaning oblique shock wave to aid the inlet compression process.