一

一

"One"

一 (yī) is used here as a numeral to specify quantity.

我想喝一杯咖啡。

I want to drink a cup of coffee.

一 (yī) describes an unspecified small amount, showing approximation or a general sense.

在学习中，一点压力是正常的。

In studies, a little pressure is normal.

一 (yī) expresses the 'step' as part of an idiomatic phrase for gradual progress.

事情要一步一步地解决。

Things need to be solved step by step.