The only new air unit is the Airship, a sub-spotting, navy-busting zeppelin that should definitely help keep your coasts clear.

唯一的新空军是空艇，像齐柏林飞艇那样可以控制海岸，侦查潜艇。

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The first propeller-driven airship, built by Henri Giffard, flew in 1852 in France; design improvements led to construction of the rigid zeppelin (1900).

第一艘成功的飞船是法国的吉法尔于1852年制造的，后来经过不断的改进，导致1900年齐柏林飞船的建构。

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World War II Spitfire and Mustang fighters added a note of nostalgia, and a modern, helium-filled Zeppelin airship bobbed and dipped above the crowd.

BBC: air show

In 1938, the German airship LZ130 Graf Zeppelin, sister ship of the ill-fated Hindenburg, made its maiden flight.

CNN: Monday,

Before his death in 1917, Count von Zeppelin, inventor of the airship, was hailed as the greatest German of the 20th century.

ECONOMIST: Monitor