// include the latest version of the regex crate in your Cargo.toml
extern crate regex;
use regex::Regex;
fn main() {
let regex = Regex::new(r"(?m)(^[%@]\tfor\t)(.*[\w\s:]??)(?![→←].*)(\[sound.*)").unwrap();
let string = "% for 1 <i><font color=\"#ab0000\">British English</font></i> to make something seem less successful, interesting, good etc than it really is: [sound:_p008-000614203.mp3] the pessimists who are talking down Britain →贬低英国的悲观主义者
@ for to talk to someone as if they are stupid, although they are not ←以高人一等的口气对〔某人〕说话； <i><font color=\"#efefef\" style=\"background-color: rgb(141, 141, 141);\">SYN</font></i> patronize: [sound:_p008-000614218.mp3] The students felt that they were talked down to as though they were children. →这些学生感到和他们说话的都是一副居高临下的口气，好像他们是小孩一样。
@ for talk somebody into doing something [sound:_p008-000614234.mp3] My husband talked me into going skiing. →我的丈夫说服我去滑雪。
";
let substitution = "\\1\\2\\t\\3";
// result will be a String with the substituted value
let result = regex.replace_all(string, substitution);
println!("{}", result);
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Rust, please visit: https://docs.rs/regex/latest/regex/