n.

a secret group organized to overthrow a government or occupation force

同義詞：resistance

an electric railway operating below the surface of the ground (usually in a city)

"in Paris the subway system is called the `metro' and in London it is called the `tube' or the `underground'"

同義詞：metrotubesubway systemsubway

The Undergrounds of The Phantom of the Opera
The Undergrounds of the Phantom of the Opera
Transferring coatings and undergrounds
Global undergrounds: the cultural politics of sound and light in Los Angeles 1965-75
Undergrounds; A Union List of Alternative Periodicals in Libraries of the United States and Canada.
The undergrounds of The Phantom of the opera: Sublimation and the Gothic in Leroux's novel and its progeny
Childhood undergrounds: Power, resistance, secrets, objects and subversion in early childhood education
On Jerrold E. Hogle's The Undergrounds of The Phantom of the Opera: Sublimation and the Gothic in Leroux's Novel and Its Progeny
Estimation of zero-sequence impedance of undergrounds cables for single-phase fault location in distribution systems with electric arc
A MULTIFUNCTIONAL SYSTEM FOR THE EXTEMPORARY SHOOTING AND VIDEORECORDING, SUPERIMPOSED TO MUSICAL UNDERGROUNDS AND PRE-RECORDED VIDE...