But we can come real close with today's recording technologies with cassette tapes and DVD and CD and MP3 recordings.
但是我们用今天的记录技术以盒式磁带音带和数字化视频光和激光唱碟和MP3录音能来真正的结束。
Put the CD into the disc tray, then close the tray.
把CD放入光碟托盘，然后关闭托盘。
Diffraction from these features (so very close to the wavelength of light) is what gives CD disks their beautiful colors.
由于上述特征形成的衍射，使光盘呈现漂亮的颜色。
Diffraction from these features (so very close to the wavelength of light) is what gives CD disks their beautiful colors.
由于上述特征形成的衍射，使光盘呈现漂亮的颜色。
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