Do not take your leave as quietly as you come. Please knock your keyboard, leave your footprints here.

轻轻的你来了，请不要轻轻的走，敲一敲键盘，留下你的足迹。

If it is simply an invitation to an evening meal and conversation, you will probably take your leave between ten and eleven o'clock.

如果只是邀请你吃晚饭和聊天的话，在十点到十一点之间离开即可。

Take some pictures of the thing you want to sell, upload the pictures online with a brief description of it and leave your connecting number.

给你想卖的东西拍些照片，把照片上传到网上，附上对它的简要描述，留下你的联系号码。