When national leaders or organizations ratify a treaty or written agreement, they make it official by giving their formal approval to it, usually by signing it or voting for it.
双语例句
例： The parliaments of Australia and Indonesia have yet to ratify the treaty.
澳大利亚和印度尼西亚的议会还未批准该条约。
例： Russia formally ratified the Kyoto Protocol on Thursday.
俄罗斯于周四正式批准了《京都议定书》。