This letter had a large green stamp on it. The address was written in small letters in blue ink.
信封上是大大的绿色的邮戳，地址是蓝色小体字。
"The main concern for us is that these plant-derived products have a green stamp on them just because they're derived from biomass," said study author Amy Landis of the University of Pittsburgh.
研究作者，来自匹兹堡大学的AmyLandis说：“我们主要关心的是虽然这些源自植物的产品都有着一个‘绿色’的邮戳，但这仅仅是因为它们来源于生物质。”
Due to green ink being used in surcharge on the Red Revenue Stamp, it was known as "Red Maiden in Green Robe".
因用绿色油墨加盖在红印花原票上，故被雅称为“绿衣红娘”。
Due to green ink being used in surcharge on the Red Revenue Stamp, it was known as "Red Maiden in Green Robe".
因用绿色油墨加盖在红印花原票上，故被雅称为“绿衣红娘”。
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