I had no screen, so I projected the slides onto an old white sheet.
我没有幕布, 所以我

片投射到一块旧的
床单上。
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国国家公园 He was probably familiar with the camera obscura, a device that projected an image through a pinhole and onto a screen in a darkened chamber (new research suggests he may have been introduced to it by the Jesuits of Delft).
维米尔可能对暗箱技术很熟悉,这种装置可以让图像透过小孔,投映到光线较暗的室内幕布上。(新的研究表明,这种技术可能是代尔夫特的耶稣会士介绍给他的)。
Peter Drummond, Sita's head of baggage, points out that the world " behind the black curtain" is fraught with logistical complexity. But greater digitisation of baggage handling is reducing lost luggage, according to Sita.
Sita行李部门负责人皮特·德拉蒙德指出,在黑色幕布之下,充满着后勤协调的复杂性。根据Sita相关数据,更好的数字化包裹处理能减少包裹丢失。
国原版语文第四册