top grade是什么意思

用法例句

An Analysis of the Superorganic Quality of Literature——Taking poems in Chinese textbooks for middle schools as examples;

浅析文学的形而上品质——以中学语文教材中的诗歌为例

The Effect of Online Brand Community on Customer Purchase Tendency;

网上品牌社区对顾客购买行为倾向影响研究