irrevocable undertaking
不可撤销的承诺
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Born into humble circumstances in Scotland, this onetime bank clerk and schoolteacher had the amazing knowledge, perspicacity and stick-to-itiveness to organize the undertaking and push it on an irrevocable course to completion.
FORBES: May Stocks Grow Like Our Language
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