blue skies are not a guarantee of continuing fine weather
蓝天并不能保证持续的好天气
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Blue skies are not a guarantee of continuing fine weather.
蔚蓝的天空不一定担保天气持续晴朗。
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Blue skies are not necessarily a guarantee of continuing fine weather.
蔚蓝的天空未必保证天气持续晴朗。
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