Most American car horns honk in the key of F.

大多数汽车喇叭的叫声是用钥匙F发出来的。 。

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B1101 Bach USA - Key of F, . 468" bore, tapered rotors and bearings, clear lacquer, Bach 336-11 mouthpiece, 7514C deluxe hardshell case. Optional Eb tuning slide available".

B1101 吧哈美国-F键，.468“内腔，锥形转片和轴承，透明亮漆，吧哈336-11吹口，7514C豪华硬箱子，选配降E可调音调滑块。

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WANG X F. the research on key technology of stress analysis based on infrared thermographic technology [d]. Harbin: Harbin Institute of technology, 2008.

[2]王喜丰。基于红外热像技术的应力分析关键技术研究[D]。哈尔滨：哈尔滨工业大学，2008。

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At the beginning of his recent book Flourish, Martin Seligman, who is one of the key, if not the key, founder of positive psychology, tells the story of how it was started with essential help from Charles F.

FORBES: Atlantic Philanthropies and Charles F. Feeney: How Wealth-in-Action Redeems Us All