If the first possibility is true, then the fossils were lifted to their present altitudes later by the plateau's upward thrust.
如果第一种可能性是确实的，那么化石是后来由于高原向上隆起才抬升到现在的高度。
She thrust forth her head from the lattice, and looked anxiously upward.
她把头探出窗格，不安地朝天仰望。
The pilot steps backward into the straps of a shoulder harness, his shoulder blades resting against two wide upward-facing fans that provide the thrust.
飞行员站进去后系上肩带。肩胛骨会靠在了两个用于提供升力、仰面朝天的风扇上。
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