tr是t和r组合在一起发音的,tr组合的单词很多,请看下面举例

try (尝试),trouble(麻烦),trousers(裤子),street(街道),tree(树),straight (直的,整洁的),struggle(挣扎),strategy(战略),structure(结构),trust (相信),truck (卡车),traffic (交通),strawberries (草莓),strange (奇怪的,陌生的)