The team says the first motions along a fault known as the Longmenshan fault line caused a rift of as much as 23 feet and lasted some 50 seconds.
该研究小组称，第一阶段是沿着龙门山断层线的运动，造成23英尺宽的地壳断裂，约为时50秒。
After several tense seconds that stretched towards eternity, the rope began making weird jerking motions.
在过了漫长的几秒后，绳子开始奇怪的摆动。
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