沉积物被从两侧的弧前脊和岛弧冲到盆地，使该处地壳承重增加，形成洼地。
Sediments washed into the basin from both the fore-arc ridge and island arc weigh down the crust in this area, creating the depression.
目的探讨罕见的盆腔内骶前脊膜膨出的临床表现、诊断及手术方法。
Objective To report anterior sacral meningocele in pelvic cavity and to discuss its clinical features, diagnostic procedures and operative approach.
结论：为了增加传统石膏掌板的强度，建议在石膏上设置两个前脊。
Conclusion: To improve strength of the conventional POP volar slab, we suggest forming two anterior ridges in the plaster.
大约两周前，这条死去的南露脊鲸被冲到位于开普敦南部40公里处宁静的Kommetjie海滩上。
The dead southern right whale washed up onto the quiet Kommetjie beach, 40 km (25 miles) south of the country's top tourist city nearly two weeks ago.
大约两周前，这条死去的南露脊鲸被冲到位于开普敦南部40公里处宁静的Kommetjie海滩上。
The dead southern right whale washed up onto the quiet Kommetjie beach, 40 km (25 miles) south of the country's top tourist city nearly two weeks ago.
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