Fifty years later, lasers are a staple in everything from astronomy, surgery and DVD players to cutting sheet metal.

五十年后，激光的用途遍及天文学、外科手术、DVD播放器到金属切割。

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Since cutting into tempered glass causes it to break, each sheet must be polished and drilled for the connecting fittings before it is tempered.

由于切入淬火玻璃会导致破碎，因此在退火前，每一层都必须抛光、打孔。

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But the process of building the sheet from first creating an Excel file, then cutting out the header and footer sections, then injecting your own data into the sheet remains the same.

但是构建数据表的过程是相同的，首先是创建Excel文件，然后去掉表头和表尾部分，最后在数据表中注入您自己的数据。

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