toolbar, with which you can add connectors to objects in the current slide. A connector is a line that joins objects, and remains attached when the objects are moved. If you copy an object with a connector, the connector is also copied.
工具栏，可以用此工具栏向当前幻灯片中的对象添加连接符。连接符是用于连接各个对象的线条，会随对象一起移动。当复制带有连接符的对象时，会同时复制连接符。