word serial

例句：

1. 1. The teacher asked the students to memorize the word serial in their textbooks.
   老师要求学生们在课本上记忆单词序列。
2. 2.The researcher compiled a vocabulary sequence for the new language learners.
   研究者为新语言学习者编制了一个词汇序列。
3. 3. In order to improve their vocabulary, the students practiced memorizing word serials.
   为了提高词汇量，学生们练习记忆单词序列。