You know the theory that earth's continents were once joined together and only split apart relatively recently?
大家都知道地球上的大陆曾经连在一起，直到最近才分开的那个理论吗？
The complementary coastlines and certain geological features that seem to span the ocean are reminders of where the two continents were once joined.
互相吻合的海岸线和某些似乎跨越海洋的地质特征会使人想到这两个大陆曾经是连在一起的。
The complementary coastlines and certain geological features that seem to span the ocean are reminders of where the two continents were once joined.
译文：互相吻合的海岸线和某些似乎跨越海洋的地质特征会使人想到这两个大陆曾经是连在一起的。 。
Once joined, and while still hot, the parts may be pulled apart slightly to reduce the wall thicknesses at the weld joint.
一旦焊接并且部件还是热的时候，可将部件稍微拉开以减少焊接接头处的壁厚。
Once joined, and while still hot, the parts may be pulled apart slightly to reduce the wall thicknesses at the weld joint.
一旦焊接并且部件还是热的时候，可将部件稍微拉开以减少焊接接头处的壁厚。
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