英语语法分析

Be careful, make sure you know the senders before you open the email.

小心，在你开信箱前要先确定那些寄件人是谁。

The scenario depicted in Figure 1 shows several senders and receivers.

图 1 描述的场景显示了几个消息发送者和接收者。

Japan was fourth among the twenty leading senders of foreign students.

在20个主要留学生的派出国中，日本列第四。