You use constant to describe something that happens all the time or is always there.
She suggests that women are under constant pressure to be abnormally thin.
她认为女性常常处于要保持异常苗条的压力之下。
Inflation is a constant threat.
通货膨胀是一种持续的威胁。
If an amount or level is constant, it stays the same over a particular period of time.
changeable , uneven
The body feels hot and the temperature remains more or less constant at the new elevated level.
身体感到发热,体温会在升高后的新温度上保持不变。
The climate is tropical with a fairly constant temperature at 24°C.
这里为热带气候,气温保持在24摄氏度。
constants
A constant is a thing or value that always stays the same.
The constants of nature are certain numbers that enter into the mathematical equations that describe the laws of physics.
自然常数是数学方程式中用来解释物理法则的特定数字。
Two significant constants have been found in a number of research studies.
许多研究已经发现了两个重要常量。