darkning mechanism变: become different; change暗: dark; dim; dull机理: mechanisation; mechanization ...变暗: blacken; browning; darkening; darkle; dimming; get dark; pale; tarnishing暗机关: gimmick下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:变暗机理，即可在微信中查询翻译
