Prepare a programme for forecast and further monitoring, it is what we call baseline.

制作一个可作预测和作监察的计划，而这计划就是我们称之为底线。

youdao

Impartial third-party monitoring from an initial baseline level of forests is essential for the real success of the programme, along with a willingness to withhold payments to countries who do not comply.

ECONOMIST: Letters