This theory is the basis of a famous thought experiment known as the twin paradox, in which a twin sibling who travels on a fast-moving rocket ship would return home younger than the other twin.

这个理论基础来自于著名试验猜想，双胞胎悖论：乘坐高速火箭飞船旅行的双胞胎哥哥（或弟弟），回到家后要比他的弟弟（或哥哥）年轻。

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This paper investigates the turning motion of a twin propeller twin rudder ship in regular waves.

本文研究了双桨双舵船在规则波中的回转运动。

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This paper introduces the application of twin-skeg lines form on two types of landing ship.

本文介绍了双艉鳍线型在两型登陆运输船设计中的应用研究成果。

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It envisions a behemoth mother ship with twin, narrow fuselages, featuring six Boeing Co. 747 engines attached to a record 385-foot wingspan, plus a smaller rocket pod nestled underneath.

WSJ: Microsoft Co-Founder to Build Massive Jet for Space Launches

His job is to keep the ship on the straight and narrow, avoiding the twin dangers of inflation on the one side and recession on the other.

FORBES: Ben Bernanke Is Steering Us Off Course