Penicillin, a crucial building block for two classes of antibiotics, tells the story of the shifting pharmaceutical marketplace.

青霉素，两种抗生素的重要起始原料，讲出了一段制药市场迁移的故事。

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This meant shifting the view around quite a bit to avoid certain walls covering up other walls, or letting steel structures block views of the context.

这意味着要大角度地转换视野，避免墙壁之间相互遮挡，或者避免钢结构框架阻挡室内空间的视线。

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The virtual grating phase shifting moire fringe method is studied to measure the parameters of gauge block which combines the techniques on grating, moire, and phase shifting interferometry.

研究了集光栅技术、莫尔技术、相移干涉术为一体的虚光栅移相莫尔条纹法测量量块的原理及关键技术。

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