Objective:To observe the structure and formation of plaque.

目的：系统了解菌斑形成的超微结构。

youdao

Objective To observe the structure alloyage in the fusion zone of different metals welded by laser.

目的观察不同金属之间焊接后熔焊区组织合金化情况。

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To get the specimen for scanning electron microscope by frozen cutting and observe the structure of the cut-surface.

扫描电镜标本用冷冻割断法，观察其割断面的表面结构。

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This way,they can observe changes in the structure of a deadly organism from one generation to the next.

VOA: special.2010.06.29

The thing that provides structure in open-water ecosystems is the food-web, which is hard to observe and malleable.

ECONOMIST: Ocean acidification

" Mr. McKeon goes on, though, to observe that the QDR "does little to address the risk resulting from the gaps in funding, capability and force structure.

CENTERFORSECURITYPOLICY: Why not the best?