The fire, which had started at the base of the 93-metre spire at about 6: 40 pm on Monday, spread through the cathedral's roof, made up of hundreds of oak beams, some dating back to the 13th century.
周一下午6点40分左右，大火从93米高的塔尖底部开始，蔓延到教堂的屋顶。教堂的屋顶由数百根橡木梁组成，其中一些梁的历史可以追溯到13世纪。
Some 3D printers spread metal powders on the print table and sinter the pattern with lasers or electron beams, rather than using masks.
比如一些3D印刷机在印刷台铺撒金属粉末之后，采用露光模板以外的激光或电子束方式进行热凝处理来产生样模。
Interior finish excludes building structural members, such as beams, trusses, studs, or subfloors, or similar items. Interior finish also excludes nonfull spread wet coatings or adhesives.
室内面层不包括建筑结构构件，如梁、桁架、螺柱或底层地板或类似物品，也不包括不完全扩散的湿涂料或粘合剂。
When charged particle beams traverse in an accelerating structure, the excited wake fields may dilute the beam energy spread and emittance.
带电粒子束在穿过加速结构时激起的尾场，会导致束流能散和发射度的增大。
When charged particle beams traverse in an accelerating structure, the excited wake fields may dilute the beam energy spread and emittance.
带电粒子束在穿过加速结构时激起的尾场，会导致束流能散和发射度的增大。
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