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Alternative spelling of hệ toạ độ
This coordinate system is widely used in mathematics.
operating system
The operating system of this phone is very smooth.
Solar System
The Solar System consists of 8 planets.
(mathematics) a system of equations
This system of equations is very complex.
the respiratory system
The human respiratory system includes the lungs, bronchi, and other related organs.
the circulatory system
The circulatory system is the system that supplies nutrients and oxygen to the body.
the digestive system
The digestive system includes the stomach, intestines, liver, and pancreas.
(biology, medicine) the urinary system
The urinary system is responsible for filtering and removing waste from the body.
the immune system
The immune system helps the body fight against bacteria and viruses.
sexual intercourse
Sexual intercourse is an important part of a romantic relationship.
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