Objective: To investigate the clinical effect and operation indications of severe lumbar spondylolisthesis with anterior and posterior once operation.

目的：探讨重度腰椎滑脱病人前后路一期手术的临床疗效及手术适应证。

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Objective To explore the clinical effect and operation method of auto-corneal limbus stem cell transplantation combined with MMC in the treatment of recurrent pterygium.

目的：探讨自体角膜缘干细胞移植术联合丝裂霉素C治疗复发性翼状胬肉的临床效果和手术方法。

youdao

It was only when the hull was hanging freely from the lifting frame, clear of the seabed and the suction effect of the surrounding mud, that the salvage operation progressed to the second stage.

只有当船体从升降架上自由悬挂，脱离海床和周围泥浆的吸力作用时，打捞工作才进入第二阶段。

youdao

The operator should use an independent risk evaluator for weather and other environmental conditions like volcanic ash or even heavy pollutants which can effect helicopter operation and pilot visibility.

FORBES: 10 Essential Checks Before You Step Into A Helicopter

Indeed, any peace and reconstruction process that is predicated on Mr Milosevic's co-operation has the side-effect of shoring up his authority, and this he is always keen to do.

ECONOMIST: A victory for despots?

Sky said they have "suspended all co-operation with ACS:Law with immediate effect" and that the suspension would "remain in place until ACS:Law demonstrates adequate measures to protect the security of personal information".

BBC: Fresh ACS:Law file-sharing lists expose thousands more