lengthening

英文解釋：

名詞 lengthening:

1. the act of prolonging something
   同義詞：prolongation, protraction, perpetuation

動詞 lengthen:

1. make longer
   同義詞：lengthen
2. become long or longer
   同義詞：lengthen

相關句子：

1. He lengthened the rope by tying another piece to it.
   他又接上一段繩子，把原來的加長了。
2. The irregular lengthening of a normally short syllable.
   一個正常情況下短音節的不規則的延長