In larger stars, pressure at the core is high enough to fuse heavier elements such as oxygen and carbon, creating more photons.
对于更大的恒星，核心的压力大得足以使更重元素进行聚变反应，比如氧和碳元素，它们将创造更多的光子。
2
NOx is produced when the nitrogen from the air reacts with oxygen under high engine temperature and pressure conditions.
在高温高压下，空气与氧气反应，产生了氮氧化物。
3
Shanghai state television showed survivors at another hospital in the city, covered in thick blankets as they emerged from a high-pressureoxygen chamber.