The fourth element is green service.
要素四是绿色服务。
Green environmental professional service.
绿色环保，专业服务。
Please have your transaction processed at the Expo Service Green Passage.
请到世博服务绿色通道办理。
The product is light green, clean, clear, long service life.
该产品是浅绿色，干净，清晰，使用寿命长。
The product is light green, clean, clear, long service life.
该产品是浅绿色，干净，清晰，使用寿命长。
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