Article in English: Click a file that you want to share with another person. You should see several icons appear at the top of the page when you do this. Sharing documents or files is useful when the file in question is over 25 MB in size, since most email providers won't allow you to send it as an attachment at that point. It's an image of a person with a "+" next to it; you'll find this icon in the upper-right side of the Drive page. Clicking it prompts a new window to open. This pencil-shaped icon is on the far-right side of the pop-up window. A drop-down menu will appear. Click one of the following options in the drop-down menu:   Can edit - The person with whom you share the document will be able to edit the document.  Can comment - The person with whom you share the document will be able to leave comments about the document, but not edit the document.  Can view - The person with whom you share the document will only be able to view, but not edit or comment on, the document. In the "People" text field that's in the middle of the window, type in an email address of a person with whom you want to share the document. You can enter multiple email addresses here by pressing the Tab ↹ key after each email address. If you want to include a set of instructions or a brief statement about the item which you're sharing, enter it in the "Add a note" text box. It's a blue button in the bottom-left side of the window. This will share the file with your selected recipient(s) via email.

Summary in Chinese:
选择一个文件。 点击“共享”。 点击“编辑”。 选择一个共享选项。 输入电子邮件地址。 添加备注。 点击发送。