In drab browns and grays on a blue background, it depicts a young blindfolded woman strumming on the last unbroken string of a harp, her ear to the instrument.
这幅画作有着单调的黄褐及灰蓝色背景，画中盲眼妇女手执竖琴，一边侧耳倾听，一边用最后几根未断的琴弦弹奏。
Performance parameters of the instrument, particle concentration and background parameters, etc.
仪器性能参数、颗粒浓度、背景参数等均可自动监测。
The principle for testing the image tube luminance and background is discussed. The constitution of the instrument and processing methods of test data are introduced.
论述像管亮度增益与背景测试仪的原理，介绍仪器的组成以及测试数据的处理方法。
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