... limb darkening 临边昏暗 anti-darkening agent 防黯色剂 darkening of oil 油品变暗 ...
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darkening of oil
油变暗
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The air-regulating agent could inhibit over-darkening of tobacco leaves and keep their chroma and oil in some degree.
气调贮存可有效抑制烟叶颜色过度转深，并在一定程度上保持烟叶的色度和油分；
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