call on 社交上的正式用语，指无目的、礼节性的短暂拜访，访问者与被访问者之间一般只有社交或公务关系。
see 常用词，含义广泛，既可指接受他人来访，又可指去访问他人。
visit 正式用词，强调出于工作需要的访问，也指亲戚朋友间的看望。
drop in 多指在计划之外或事先未打招呼的偶然、顺便访问。也可指参观。
参考例句
1. Now that we're in Europe we ought to visit the Netherlands. 既然我们到了欧洲，就应当去荷兰。
2. How come you never visit us anymore? 为什么你不再来探望我们了。
3. Please do visit Philippines again, we all love you here. 请不要再次访问菲律宾，我们都爱你这里。
英英解释
n.
1. the act of going to see some person or place or thing for a short time
2. a meeting arranged by the visitor to see someone (such as a doctor or lawyer) for treatment or advic
3. the act of visiting in an official capacity (as for an inspection)
4. the act of going to see some person in a professional capacity
5. a temporary stay (e.g., as a guest) v.
1. visit a place, as for entertainment
2. go to certain places as for sightseeing
3. pay a brief visit
4. come to see in an official or professional capacity
5. impose something unpleasant
6. talk socially without exchanging too much information
7. stay with as a guest
8. assail
