航空、航天发动机：活塞式发动机、（）、特种发动机。

航空航天是人类拓展（）的产物。

Every deliberate act of wrongdoing by the master or any of the crew against the ship or cargo，without the authorization or privity of the Shipowner or his agent，is（）.

（）, or drum is used for hauling in or letting out the wires or ropes which will fasten the ship to the shore.

A salvor may be（）the whole or part of the payment due under Salvage Convention to the extent that the salvage operations have become necessary or more difficult because of fault or neglect on his part or if the salvor has been guilty of fraud or other dishonest conduct.

The （） is used for hauling in or letting out the wires or ropes.

Vessels must be（）valid certificate of nationality or certificated of registry or license.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

封闭环的最大极限尺寸等于各增环的最大极限尺寸（）各减环的最小极限尺寸之和。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

南京航空航天大学图书馆的网址是（）。

南京航空航天大学图书馆网站站主页网址是（）