品级的英文：
grade; official rank in feudal times

参考例句：

A classification according to specialty or proficiency,as of a member of the armed forces.
品级根据特长和熟练程度进行的分类，例如在军队中实行的品级制

Quick Render(Production)
产品级快速渲染

A bishop ranks with a peer.
主教和贵族品级相等。

We must try to upgrade our cattle to the required standard of meat.
我们必须努力提高牛的品级，使之达到所要求的食用肉标准。

The deposit is concentrated at the bottom of the embayment with highgrade dissemination at a higher elevation above it
矿体集聚在凹陷的底部，而比它高的位置才有高品级的分布。

Rank holds its court and receives its homage on every round of the ladder, from the emperor down to the rat-catcher.
从皇帝起，依次递降到捕耗子为生的，他们的品级是逐层地受到尊重。

grade是什么意思：
n. 年级；阶段；等级
v. 将…按级别分类；给…批分数，改作业；混合

longitudinal grade
纵坡度

There are lots of jobs in junior grades.
初级阶段有很多工作要做。

Red grades into pink.
红色逐渐变成粉红色。

official是什么意思：
n. 官员，行政人员；裁判员，执法人
adj. 官方的，法定的，正式的；公务的，公职的；冠冕堂皇的；官员的

Babbitt was an official delegate.
巴比特是一名正式代表。

He is an important official in the government.
他是政府的要员。

It is a scandal for officials to take bribes.
政府官员接受贿赂是可耻的事。

rank是什么意思：
n. 排；等级；军衔；队列；行列
v. 排列；把…分等；列为；列队
adj. 讨厌的；恶臭的；繁茂的

formation; rank
队形

He rose from the rank of captain to the rank of general.
他从上尉升到将军。

Your rank is next to mine.
你的排名居于我之后。