| 释义 |
- See also
{{wiktionary|three Rs}}3R may refer to: - The three Rs, a widely used abbreviation for the basic elements of a primary school curriculum: reading, 'riting (writing), and 'rithmetic (arithmetic)
- The three Rs, a widely used abbreviation for the waste management hierarchy: reduce, reuse, and recycle
- The Three Rs (animals), principles for ethical use of animals in testing: replacement, reduction, refinement
- 3R (optical regenerator), an optical communications repeater that performs reamplification, reshaping, and retiming
- Intelsat 3R, a former communications satellite
- Yaesu VX-3R, an ultra-compact dual band amateur radio transceiver
- British Rail Class 206, Southern Region designation 3R from 3-car Reading Line stock
- 3R (print size), a standard consumer print size for photographs
See also- RRR (disambiguation)
- R3 (disambiguation)
{{letter-Number Combination Disambiguation}} |