hyphenation

例句：

1. 1. The word "apple" is pronounced as "a-pēl" with a hyphen.
   单词“apple”发音为“a-pēl”，带有连字符。
2. 2.Hyphenated words are used to indicate that two words are connected without forming a new word.
   连字符用于表示两个词不形成新词而连接在一起。
3. 3.In scientific notation, the hyphen is used to separate the exponents of powers and roots.
   在科学记数法中，连字符用于分隔指数和根号。