B-vitamins
B族维生素
🧩 词语组成解析
n. 维生素（ vitamin的复数形式 ）
🗣️ 情景例句
young and old.
不管是年轻的， 还是年老的。
Prompt delivery would be necessary as we have a fast turnover in this trade. We would therefore need your assurance that you could meet all delivery dates.
即期交货很重要，因为这种货流转很快。所以我们需要你方保证及时交货。
Luckily the weather was not so wet as it is today.
幸运的是，那天的天气不像今天这样有雨。