尽管方帆船在顺风或无风航行时十分高效，它们逆风行驶时从帆前缘得到的动力却不如百慕大帆多，而帆前缘的动力在现代成为了主要动力。
Remarkably efficient sailing downwind or well off the wind, square sails do not generate power from their leading edge as in the Bermuda rig, which has become predominant in modern times.
当成百上千只雄帝企鹅挤在一起时就形成了一个大“团”。这些雄帝企鹅不断地移动着，从寒冷的外圈慢慢地转动到温暖无风的中心部位。
Huddle forms when hundreds, even thousands, of males crowd together.The birds move constantly, slowly rotating from the cold outside rings to the warm, wind-free center.
加拿大无风险率是百分之七和美国风险免费为5 %。
The Canadian risk-free rate is 7% and the US risk free is 5%.
加拿大无风险率是百分之七和美国风险免费为5 %。
The Canadian risk-free rate is 7% and the US risk free is 5%.
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