等级良好用英语怎么说

"Grade good" in English is usually expressed as "of good quality" or "of good standard".

It originates from the grading system used in various fields to evaluate the quality of a product or service, where "good" is often used as a standard for acceptable or above average quality.

For example:

"This wine is of good quality and has received positive reviews from critics."
"This hotel provides services of good standard and is highly recommended by guests."

In both cases, "of good quality" and "of good standard" indicate that the product or service meets a certain level of quality, which is considered to be good.