n. a quantity that does not vary
n. a number representing a quantity assumed to have a fixed value in a specified mathematical context
a. steadfast in purpose or devotion or affection
n. 常数, 恒量
a. 不变的, 一定的, 时常的
[计] 常量; 常数; 恒值
1. The speed of light is a constant in physics.
光速是物理学中的一个常数。
2. She has a constant smile on her face.
她脸上总是挂着微笑。
3. It is important to maintain a constant temperature for the experiment.
保持实验的恒定温度很重要。