以下为句子列表：
英文: Permanent surveying markers as referred to in paragraph 1 of this Article include wooden or steel signals and stone markers established at triangulation points, baseline points, traverse points, military control points, gravimetric points, astronomic poin
中文: 第一款所称永久性测量标志，是指各等级的三角点、基线点、导线点、军用控制点、重力点、天文点、水准点的木质觇标、钢质觇标和标石标志，以及用于地形测图、工程测量和形变测量的固定标志和海底大地点设施等。
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英文: With most airspace under military control and little spare capacity in civilian airspace, getting permission to fly means applying up to five days in advance, which rather undermines a big reason for owning a private jet, namely greater flexibility.
中文: 由于多数空域被军队控制着，仅有少量空域可用于民用航空，所以飞行许可要提前五天申请，这是阻挡个人购买私人飞机（增加灵活性）的一个大原因。
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