但从第二到第三阶段的过渡是同样重要的，不应该被忽略。
But the transition from the second to the third is equally important, and should not be forgotten.
莽草酸水平的提高，从第一阶段到第三阶段，然后有所下降。
Shikimic acid level increased from stage one to stage three, then decreased slightly.
到第三阶段(2019至2023)，所有有核能力的国家均从法律上认可全球零核的协议并在上面签字。
The third phase (2019-23) would see the global zero accord legally agreed on and signed by all nuclear-capable states.
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