b If the option of a third commitment period from 2021 to 2028 is chosen, the proposed amendment would include the definition of the commitment period, but numbers would not necessarily be specified in the fourth column of Annex B as amended.
b 如果选择2021-2028年为第三个承诺期，修正案提案将包括承诺期的定义，但数字不一定会在经修正的附件B第四列标明。