级

I have advanced only one degree in promotion.

top-level negotiations

rank of full professor

No 1 alert; red alert

first-class product; grade A product

force 7 wind/gale; moderate gale

grade-two worker

conference at the ministerial level; ministerial conference

earthquake of magnitude eight (on the Richter scale)

follow the steps up

a flight of a dozen steps

seven-storey tower

multistage rocket

An elementary school in China has six grades.

He is up a class this year.

be in different classes of the same grade