**Call On**

**释义:**

1. **邀请;召唤**:指请求或要求某人做某事,或者邀请某人参加活动。

   - 例句:The organizer called on all members to attend the meeting promptly. (组织者呼吁所有成员准时参加会议。)

2. **拜访**:指访问某人的家或办公室。

   - 例句:I'll call on you at your office tomorrow afternoon. (我明天下午会去你的办公室拜访。)

3. **号召;呼吁**:公开请求或劝说人们采取行动。

   - 例句:The charity organization called on the public to donate for the disaster relief. (慈善机构呼吁公众为救灾捐款。)

4. **依靠;依赖**:指在需要时依靠某人或某事物。

   - 例句:In times of crisis, we can always call on our friends for support. (在危机时刻,我们总能依赖朋友的支持。)

**同义词辨析:**

1. **Invite**:与"call on"在邀请的意义上有相似之处,但"invite"通常用于更正式或私人的场合,如邀请参加聚会或晚宴。

   - 例句:She invited us to her birthday party. (她邀请我们参加她的生日派对。)

2. **Visit**:在“拜访”的意义上,"visit"更为通用,可以指社交性的访问,也可以指商务访问。

   - 例句:We're planning to visit some museums during our trip. (我们计划在旅行期间参观一些博物馆。)

3. **Appeal to**:在“号召;呼吁”的意义上,"appeal to"强调的是对情感或道德的诉求。

   - 例句:The ad campaign appeals to people's sense of responsibility towards the environment. (广告活动呼吁人们对环境的责任感。)

4. **Rely on**:与"call on"在“依靠;依赖”的意义上相近,但"rely on"更强调持续的信赖关系。

   - 例句:We can always rely on her for good advice. (我们总能依赖她给出好的建议。)