その国は通商条約の廃棄を一方的に通告した。
That country unilaterally gave notice that it was abrogating the trade treaty.
政府は旧協定を廃棄し、新たな協定を結んだ。
The government renounced the old agreement and concluded a new one.
条約は廃棄されるまで五十年間効力を持った。
The treaty remained in force for fifty years until it was abrogated.