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Tells you she 's hurting before she keels .

在她翻倒以前,会告诉你她很受伤。

As only a very general rule , most sailboats over 20-something feet have fixed keels .

作为一条通常规律，大部分20英尺以上的帆船使用固定龙骨。

Sailboats have many different types of fixed keels , such as full keels ( see photo ) and fin keels .

帆船有许多种不同类型的固定龙骨，例如全龙骨（见上图）及鳍板。

If you are shopping for a sailboat in this range , you should understand the differences between these fundamental types of keels .

若你是在这个尺寸范围内寻购帆船，那你应该学习了解一下龙骨的这些基本类型之间的差别。