Mexico's Defense Ministry this month signed a pact that allows Mexican troops to train at American bases.墨西哥国防部本月签署条约，使墨西哥军队可在美军基地上接受训练。The United States stood alone in its refusal to sign the treaty.美国一意孤行，拒绝签署条约。It's time to shame holdouts into signing the treaty.现在时机到了，应该让顽固分子感到羞愧而签署条约。Their surrender was formalized in a treaty.他们签署条约正式投降。