二类占28.3%，三类占14.4%，四类占8.9%，劣四类占27.1%。

二类占28.3%，三类占14.4%，四类占8.9%，劣四类占27.1%。的英文翻译

基本释义

• 28.3 percent reached Grade II;14.4 percent reached Grade III; 8.9 reached Grade IV,and the remaining 27.1 percent exceeded Grade IV.