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A triangulation station, also known as a triangulation pillar, trigonometrical station, trigonometrical point, trig station, trig beacon, or trig point, and sometimes informally as a trig, is a fixed surveying station, used in geodetic surveying and other surveying projects in its vicinity.
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Answer:
the process of improvement
The term bioinvasion means that a plant or animal is not native in their current location and often spreads to a dangerous degree which is harmful to it's new environment, to the economy and to human health. An example of this is the Asian longhorned beetle which infected and damaged millions of acres of hardwood trees, as it was introduced in the United States.