Ptolemy IV was one of several Greek royals who ruled Egypt during the Ptolemaic period, from 332 to 30 B. c.

托勒密四世是公元前332年-公元前30年托勒密时期几名统治埃及的希腊王室成员之一。

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Ptolemy II was the first general who ruled Egypt, and then his descendants would be named II, III, and IV and that sort of — and so forth.

托勒密二世是第一个治理埃及的将领，他的子嗣就叫二世，三世，四世，以此类推。

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Mr. Knecht breaks up the story of Lucky Linda's construction by salting in some rather fun history of yachting though the ages, beginning with Pharaoh Ptolemy IV, who ruled Egypt 200 years before Christ and built a 400-foot vessel powered by several hundred oarsmen.

WSJ: Book Review: Grand Ambition