"忘记新单词" 用英文表达为 "forget new words"。来源是由 "forget" 和 "new words" 两个词组合而成，表示不记得新学过的单词。
例句1:
I always forget new words when I learn a new language.
我学新语言时总是忘记新单词。
例句2:
It's hard to remember new words when you don't practice them regularly.
不经常练习新单词会很难记住。
例句3:
I have a terrible memory and I always forget new words I learn.
我的记忆力很差，我总是忘记新学过的单词。