laggard：a person who makes slow progress and falls behind others
例句：The Chinese national football team has long been a laggard, an embarrassment to many Chinese.
仿写：English education in China has been a laggard，most of Chinese have been learned English for more than 10 years without saying a fluent sentence when talking with a foreigner.
从领头羊变成了落后者：go from a leader to a laggard”这一表达.
造句：Without innovation，any big company may goes from a leader to a laggard.
这个国家的经济一度落后，不过现在已经开始迎头赶上了。 Once a laggard, the economy of this country is starting to catch up.
仿写：Once a laggard，my English is starting to catch up with the help of my foreign teacher.