研究了E10合成低酸值树脂对硝基漆漆膜及原漆黄变的影响。
The yellowing effect of E10 synthetic low acid value resin to paint film of nitrocellulose lacquer and to the original lacquer was studied.
随着冬天的到来，树叶变黄，开始飘落。
With winter coming, leaves of trees turn yellow and begin to fall.
随着时间的流逝，报纸为什么会变黄呢？
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