| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | diesel engine | South Korea | Commonly used in buses and commercial vehicles for public transportation | 1 |
| 2 | engines | South Korea | Engines are also a key component of high-speed trains, such as the Shinkansen and KTX. | 1 |
| 3 | engines | South Korea | Engines are essential for the manufacturing sector, particularly in the context of developing economies where industrial growth heavily relies on machinery and power generation. | 1 |
| 4 | internal combustion engine | South Korea | Commonly used in motorcycles and small vehicles for efficient transportation in densely populated urban areas | 1 |