He had seen me several times and had intended to call on me long before but a peculiar combination of circumstances had prevented it—signed Jay Gatsby in a majestic hand.(他见过我几次，早就打算来看我了，但是由于种种特殊的情况，他没有来——他威严地签下名字：杰伊·盖茨比。)
It's never the wrong time to call on Toad.(拜访托德的时机永远不会错。)
The president paid a courtesy call on Emperor Akihito.(总统礼节性地拜访了明仁天皇。)
If you are making a long distance call on a public telephone and run out of money, give the number on your phone to the person you're talking to. Then hang up the receiver and he can call you back.(如果你用公共电话打长途，钱花光了，把你的电话号码给你正在通话的人，然后挂上电话，他会给你回电话的。)
I've never even ventured to call on him at his own home myself, though I know him so well.(虽然我很了解他，但我从来没有冒险到他家里去拜访他。)
Last but not least, we should call on citizens to take the bus instead of driving a car as much as possible.(最后但同样重要的是，我们应该呼吁市民尽可能选择搭乘公交而非驾车出行。)
I call on him on occasion.(我偶尔去拜访他。)
I'm going to call on one of my former classmates.(我要去看望我的一位老同学。)
Also, mothers may call on their children more often than fathers, given traditional gender norms.(此外，考虑到传统的性别规范，母亲可能比父亲更频繁地去看望孩子。)
I think we should figure out some ways to stop people from polluting the river and call on them to fight against pollution.(我认为我们应该要想出一些办法来阻止人们污染这条河，并号召人们同污染做斗争。)
