; while the PLA is still evaluating
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。关于这个话题，新收录的资料提供了深入分析
The stamp’s background fill color is [COLOR] — muted, desaturated, dusty, vintage-toned, completely flat. No gradients, no shading. The illustration engraving lines must be a significantly darker shade of [COLOR], dark enough to stand out clearly and crisply against the background at high contrast.。关于这个话题，新收录的资料提供了深入分析
In the 16th century, Chinese and Dutch musicians independently came up with an alternative system to harmonics-based tuning, called 12-tone equal temperament, or 12-TET. It’s the system that the entire Western world uses today. The idea behind 12-TET is to have everything be pretty much in tune, which you accomplish by having everything be a little bit out of tune. Is this a worthwhile compromise? Let’s do the math and find out.