Malta wins the race for most slothful country, with 72% of adults getting too little exercise.Swaziland and Saudi Arabia slouch in close behind, with 69%. 这里slouch in close behind是什么用法?
学生反复查看了柯林斯on的42条用法,朗文的49条用法,感觉没有一条释义可解释以下句子或结构中on的用法。 一,An honorary degree was conferred on him. 二 ,congratulate sb on sth 三,Troops advanced on the rebel stronghold.