(© George Bush Presidential Library/MCT/Getty Images)

CAVU是什么？这个词频繁出现在社交媒体上与前总统布什去世相关的内容中。CAVU的全称是“Ceiling and Visibility Unlimited”，意思是无云且能见度极好，是布什总统的个人座右铭。他在给自己孩子的信中写道：“CAVU是我们海军飞行员要在太平洋上从航母起飞时想要的那种天气。那时我们几乎没有导航仪器，所以我们想要CAVU——无云且能见度极好。”

What is CAVU? It is showing up across social media related to the passing of former President Bush. It stands for “Ceiling and Visibility Unlimited” and was a personal motto of President Bush’s. He wrote in a letter to his children, “CAVU was the kind of weather we Navy pilots wanted when we were to fly off our carrier in the Pacific. We had little navigational instrumentation, so we wanted CAVU -- ‘Ceiling and Visibility Unlimited.’ ”