1. At high altitudes it is difficult to breathe.
   在海拔高的地方会感到呼吸困难。
2. The plane was flying at an altitude of 2000 meters.
   这时飞机的高度是2000公尺。
3. The plane flew at an altitude of 20, 000 feet.
   这架飞机在两万英尺的高空飞行。
4. What is the altitude of the top of the mountain?
   这座山的顶峰海拔是多少?
5. The plane can fly at a maximum altitude of 75,000 feet.
   飞机最高飞行度为七万五千??。
6. The plane was grabbing for altitude.
   这架飞机在抢占高度。
7. The pilot shot up to a high altitude where he let loose full blat.
   飞行员将飞机猛地升上了高空，然后全速前进。
8. It is shown that test aerospike nozzle has good altitude compensability of thrust.
   实验表明，塞式喷管具有良好的高度补偿能力和较高的效率。
9. Now thrust could be generated (for “free” again) at periapsis, progressively increasing the altitude of apoapsis.
   这时可以「免费」在近心点产生推力，渐渐将远心点的高度提升。
10. The lower boundary of the region above which molecular diffusion dominates is 120 km altitude and is known as the turbopause.
    分子扩散占主导地位的区域下界约在120公里处称为湍流层顶。
11. Appropriate basically distributings first-classly n cultivated land in altitude Campagna mixes 300 meters of the following river valley alluviation near the village.
    宜耕一等地主要分布在海拔300米以下的河谷冲积平原和村庄四周。
12. So the bumpiness, the rising high altitude, and the long duration of these two things made this short distance of the road the toughest.
    崎岖不平的道路，逐步升高的海拔，和很长的持续时间使这段路程成为了最艰难的一段。
13. The small intestine was gained to make microtome section and mucous membrane of small intestine morphology, trophonema altitude, thickness and crypt shade were observed under light microscope.
    取小肠制作切片光镜观察小肠黏膜形态学变化及绒毛高度、厚度和隐窝深浅等。

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