To align items in the table, select the plus (+) button on the canvas, press the Ctrl key, and click the table.

要对齐表中的项目，选择工作区上的加号(+)按钮，按下ctrl键，然后单击表。

Select the Total Price input field on the canvas, press the Ctrl key, and click the table.

选择工作区上的 Total Price 输入字段，按下 Ctrl 键，然后单击表。

The producing process and technical key of polyethylene postal bag are introduced and the advantage of polyethylene postal bag in place of pure cotton canvas postal bag is described.

简介丙纶邮政袋的生产工艺及技术关键，叙述丙纶邮政袋替代纯棉帆布邮政袋的优势。