amplitude

中文： 幅度、振幅

1. The measure of the size of something, especially its width or breadth; largeness, magnitude. (countable, uncountable)
2. The maximum absolute value of the vertical component of a curve or function, especially one that is periodic. (countable, uncountable)
3. The maximum absolute value of some quantity that varies. (countable, uncountable)
4. The arc of the horizon between the true east or west point and the center of the sun, or a star, at its rising or setting. At the rising, the amplitude is eastern or ortive: at the setting, it is western, occiduous, or occasive. It is also northern or southern, when north or south of the equator. (countable, uncountable)
5. The arc of the horizon between the true east or west point and the foot of the vertical circle passing through any star or object. (countable, uncountable)
6. The horizontal line which measures the distance to which a projectile is thrown; the range. (countable, uncountable)
7. The range of motion of the gymnast's body while performing a skill. (countable, uncountable)
8. The range of environmental conditions in which an organism can survive. (countable, uncountable)

复数 amplitudes