技术上，恒指失守18000关口，反映走势仍偏淡。
Technically, HSI failed to hold 18000 level, suggesting trend remains weak.
截至收盘，恒指上涨575.83点，收报13154.43点，涨幅4.58%。
The Hang Seng Index rose 575.83 points, or 4.58%, to close at 13154.43.
恒偏向棱镜是指能恒定改变光束传输方向的转向元件。
Constant deviation prism is a turning element which can invariably transform the propagating direction of the light beam.
恒偏向棱镜是指能恒定改变光束传输方向的转向元件。
Constant deviation prism is a turning element which can invariably transform the propagating direction of the light beam.
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