问题描述：
求大侠帮忙翻译个英文句子,真不懂
1.On the other hand, the theory is unconvincing because the movement does not normally occur along lines, and it certainly does not occur along lines broken by frequent changes in direction, as the ridge is.2.An alternative theory is that the sinking part of the plate, which is denser than the hotter surroundings, pulls the rest of plate after it.
请不要自动翻译···
1.On the other hand, the theory is unconvincing because the movement does not normally occur along lines, and it certainly does not occur along lines broken by frequent changes in direction, as the ridge is.2.An alternative theory is that the sinking part of the plate, which is denser than the hotter surroundings, pulls the rest of plate after it.
请不要自动翻译···
问题解答：
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