let alone dive
更别说潜水了
以上为机器翻译结果，长、整句建议使用 人工翻译 。
When Mr Obama may dip his toe in these choppy waters, let alone dive in, remains unclear.
姑且不论一头埋进，欧巴马先生何时愿意淌进这滩浑水，还是个问号。
youdao
ECONOMIST: Could this be the year for immigration reform?
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