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
Don't be upset by Boswell's commercial.
不要为了Boswell的广告而忧心。
Can you guess what I was doing this morning?
你能猜测我今早正在做什么吗？
Just as Mrs.Richards was entering the dinning room, there was a knock on the front door.
理查兹夫人刚刚走进餐厅，前门就传来敲门声。