Observers from Earth can see two types of eclipses â eclipses of the Sun (solar eclipses), and eclipses of the Moon (lunar eclipses). These occur when the Sun, Earth and Moon align in a straight or almost straight configuration.
TRR may refer to: 1  China Bay Airport near Trincomalee, Sri Lanka. 2  Tamper-resistant receptacle, child-safe power receptacle required in new and renovated dwellings since the U.S. 2008 National Electrical Code.3  Target row refresh, a hardware feature of DDR4 used to prevent the row hammer effect from occurring. Tamper-resistant receptacle, child-safe power receptacle required in new and renovated dwellings since the U.S. 2008 National Electrical Code. 2  Target row refresh, a hardware feature of DDR4 used to prevent the row hammer effect from occurring.
TMR is a new procedure used to treat inoperable heart disease in people with persistent angina that isn't relieved by any other method. Most people with coronary artery disease are treated with angioplasty and stenting or, coronary bypass surgery and medications to improve blood flow to the heart muscle.MR is a surgical procedure. It is performed through a small incision in either the left side or the middle of the chest. Frequently, it is performed along with coronary bypass surgery, occasionally alone. Once the incision is made, the surgeon exposes the heart muscle.