20.88 实质性会议服务方面出现差异的主要原因是会议次数不对称，在奇数年举行森林和林业委员会和欧洲林业委员会联席会议，在偶数年为森林和林业委员会的一届会议提供服务。因此，2020年的届会次数将比 2019 年少。出现差异的另一个原因是，由于日益采用电子手段，并且在其他正式会议结束后随即举行非正式会议，因此森林政策专家小组的正式会议次数减少。
20.88 The variance in substantive services for meetings is driven mainly by an asymmetry in the number of meetings, with a joint session of the Committee on Forests and the Forest Industry and the European Forestry Commission held in odd-numbered years and a session of the Committee on Forests and the Forest Industry serviced in even-numbered years. Thus, there will be fewer sessions in 2020 as compared with 2019. It is also driven by the decreased number of official meetings of the Team of Specialists on Forest Policy, caused by an increasing use of electronic means and informal meetings held back-to-back with other formal meetings.