Premium grades
[化] 优等品
🧩 词语组成解析
n. 分数；等级（grade的复数形式）
🗣️ 情景例句
He is now involved in stocks.
他现在热衷于股票。
Are you free tomorrow?
你明天有空吗？
Four days after setting out, while the Titanic was sailing across the icy water of the North Atlantic,
“泰坦尼克”起航后的第4天，它正行驶在北大西洋冰冷的海面上。