B-complex vitamin
【生物化学】维生素 B 复合物[亦作 vitamin B complex]
🧩 词语组成解析
🗣️ 情景例句
Welcome home--
欢迎归来。
A good teacher should always avoid embarrassing his students.
一位好的教师无论何时都应该避免使学生感到难堪。
His work starts at half past eight, and finishes at a quarter to five.
30开始工作，4：45下班。