Abstract: A physical analysis method, a sample for physical analysis and a preparing method thereof are provided. The preparing method of the sample for physical analysis includes: providing a sample to be inspected; and forming a contrast enhancement layer on a surface of the sample to be inspected. The contrast enhancement layer includes a plurality of first material layers and a plurality of second material layers stacked upon one another. The first material layer and the second material layer are made of different materials. Each one of the first and second material layers has a thickness that does not exceed 0.1 nm. In an image captured by an electron microscope, a difference between an average grayscale value of a surface layer image of the sample to be inspected and an average grayscale value of an image of the contrast enhancement layer is at least 50.

Abstract: The present invention provides a covering structure for exterior of aquarium, which includes a peripheral covering layer configured with a plurality of slide grooves that provide effectiveness of tracks and enable a tight fit to the corners of an aquarium. The covering structure thus provides a sliding means to interplay with the aquarium, moreover, extending the peripheral covering layer provides additional holding space, and increasing the plurality of slide grooves enables further segmentation, thereby augmenting the holding capacity of the covering layer and enabling variability in outward appearance to transform the aquarium into a craftwork similar to a building. Furthermore, the covering structure is joined to the corners of the aquarium using the slide grooves and a mounting method, which saves on time and provides a quick method to change the outward appearance of the aquarium, presenting a design of economic benefit and improving appreciative value of the aquarium.