external word的用法和樣例：
例句
- The history of English lexical expansion is one that is characterized with heavy borrowing and word formation.
英語辭彙增加的歷史特點是大量地借用外來詞和通過構詞法構成新詞。 - Start by learning to recognize the foreign word, quizzing yourself on the English translation.
開始先學習認識外來詞，按英語的翻譯考問自己。
