注气器要放置地面要平整，环境要干燥。
空间环境条件对地面航天器发射和空间航天器系统运行有很大影响。
The big effect of space environment upon launch and operation of space vehicle are discussed.
研究飞行振动环境载荷地面试验模拟的等效性问题。
Excitation equivalence in ground vibration test with respect to real flight vibration environment is studied.
因此地面与地下的连接通道则成了空间环境转换的主角。
Therefore, the conjuncture of ground and underground become the main character of spatial conversion.
在地面上生小火使叶子在充满浓烟的环境中调制。
Small fires are built on the floor, and the leaves cure in a smoke-laden atmosphere.
在地面上生小火使叶子在充满浓烟的环境中调制。
Small fires are built on the floor, and the leaves cure in a smoke-laden atmosphere.
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