0 a border between two countries -- 國境，邊境
Some of the frontier between Germany and Poland follows the course of the river Oder. 德國與波蘭的部分邊界是沿奧德河劃分的。
Nepal has frontiers with both India and China. 尼泊爾與中國和印度都接壤。
They lived in a town close to the frontier. 他們居住在一個離邊界很近的城鎮。
The Homestead Act of 1862 gave free land to pioneers who settled the frontier. 1862年的《宅地法》免費把土地給予到西部前沿地區定居的先驅者。
At the frontier, there were people pestering tourists for cigarettes, food or alcohol.
Two armed men were caught trying to cross the frontier at night.
The president pledged to respect the existing frontiers between the two countries.
However, this particular frontier has been well mined, and large parts of this book tread well-worn paths.
Technical inefficiency is the deviation of an individual vessel's production from this best-practice frontier, and hence is a measure of relative technical efficiency.
Violation of this assumption will also affect the production frontier if the counties that define the frontier do not have sufficient standing timber.
