They were less than enthusiastic. = They were far from enthusiastic.他们远不够热情。The water is really hot/cold.这水可真够热的/凉的。Take your shirt off - Heaven knows it's hot enough today!把衬衫脱了——今天可够热的！The food was nice enough but the service was somewhat lackadaisical.这里的饭菜不错但服务不够热情。