My measurements confirm this: I'm composing this section aboard a fully occupied Airbus 320 at cruising altitude, recording 750 ppm - within safe parameters. During taxiing, I measured 2299 ppm - dangerously elevated. While gate-connected systems appear ineffective during passenger movement, I recorded 1826 ppm immediately before departure.
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。关于这个话题，苹果音乐Apple Music提供了深入分析
normal_at_surface = jax.grad(distance_function)(point_at_surface)
当然，这些没人会明说。但你去馆里看看就知道了。
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