B2 impossible to see看不见的,隐形的
[ before noun ] specialized finance & economics used to refer to money that is added to a country's economy by activities such as the service and financial industries rather than the production of goods in factories(指服务业、金融业等所产生的收入)无形的
More examples
As the boat picked up speed, the coastline receded into the distance until finally it became invisible.
The police found traces of blood on his jacket that were invisible to the naked eye.
The sensor is able to detect invisible forms of radiation.
The infrared rays are invisible except when viewed through a special filter.
The fishing lines are almost invisible to the fish.
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