所有这些关于板块厚度的明显标志有可能弄错吗？
Can all these apparent indications of plate thickness really be mistaken?
首先要注意：岩石圈厚度和板块厚度之间可能有重要区别。
Notice first that there could be a substantial difference between lithosphere thickness and plate thickness.
地球有7个大的板块，厚度约为80公里，它们的运动方式相关。
There are 7 major crustal plates on earth, about 80 km thick, all in constant motion.
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