call at 和call on的区别：含义不同、用法不同。call at中文含义为“到…进行短暂访问”、“停留”，后面接表示地点或场所的词语；call on中文含义为“拜访”、“呼吁”、“要求”、“看望”，后接表示人的名词或代词。
一、call at的含义及用法介绍
call at意为到…进行短暂访问;停留。
例句：Could I have an alarm call at 5.30 tomorrow, please?
请在明天早晨5:30打电话叫醒我好吗？
In the Senate, the count is too close to call at this point.
参议院现在的票数还难分上下。
She asked him to call at brown's hotel to see her daughter.
她要他去布朗旅馆见她的女儿。
She thinks she can call me at all hours of the day and night.
她以为她可以不分昼夜随时给我打电话。
The salesman will call back at any house he missed.
那个推销员将重访他所怀念的每所房子。
Just make sure you call at the end of the show.
只要确保节目结束时为她投票就好。
I had no time to call at the place where he was working.
我没时间去他工作的地方探望他。
二、call on的含义及用法介绍
call on意为拜访;呼吁;要求;（短暂）探访;看望。
例句：Sofia was intending to call on Miss Kitts.
索菲娅打算去拜访基茨小姐。
The job was to call on all her diplomatic skills and moral courage.
这项工作需要她发挥全部的外交才能和捍卫正义的勇气。
We base this call on grounds of social justice and equity.
我们基于社会正义和公平发出这一呼吁。
The President paid a courtesy call on Emperor Akihito.
总统对明仁天皇进行了礼节性的拜访。
I'm going to call on one of my former classmates.
我要去看望我的一位老同学。
Please give him a message that I won't call on him tomorrow.
请你替我过话儿，就说我明天不去找他了。
