They are waiting for a bus at the bus stop.用介词for, 整句话的意思是“他们正在公交站等待巴士”。wait for, 意思是等待...，同义词是await
填forwait是不及物动词，后跟宾语时要加介词for They are waiting for a bus at the bus stop.他们在公交车站等公交车。
