zài / tàn jiāo yì / xiàng mù / píng gū / zhōng / é wài xìng / shì / pàn duàn / jiǎn pái liàng / shì fǒu / zhēn shí / yǒu xiào / de / zhòng yào / biāo zhǔn

在碳交易项目评估中，额外性是判断减排量是否真实有效的重要标准。

In evaluating carbon-trading projects, additionality is an important criterion for determining whether the claimed emissions reductions are genuine and effective.