Translate the following phrase into Chinese.
WTO guidelines
Translate the following phrases into English.
国家级旅游
Translate the following phrase into English.
国内旅游
august bodies
空架滑车
往返旅行
Translate the following phrases into Chinese.
database
a wilderness park
destination country
sponsor a continuous survey
余暇
获得利润
出境旅游
package tours
寡头垄断
Translate the following into Chinese.
purchasing power
scope economies
包机航班
dominant paradigm