Je was op zoek naar: single click double click tr... (Engels - Chinees (Vereenvoudigd))

a single click on a file will select and focus, a double click opens the file or steps into the directory.
单击一个文件来选择它， 双击打开文件或者进入一个目录 。

triple click selects from current word forward
三击鼠标时， 反向选中当前单词

double-click selects (classic)
双击选择 (经典)

the default behavior in kde is to select and activate icons with a single click of the left button on your pointing device. this behavior is consistent with what you would expect when you click links in most web browsers. if you would prefer to select with a single click, and activate with a double click, check this option.
kde 的默认行为是指点设备的左按钮单击选中并激活图标。 这和您在大多数 web 浏览器中单击链接时的行为是一致的。 如果您希望单击选中， 双击激活， 使用这个选项 。