Everything is in the bag.一切准备妥当。

Everything is in the bag.字面意思是“每样东西都在包里了”，引申为一切都已经准备妥当。相当于Everything is ready.

如果你打算和朋友去旅游，把东西都打包装好后，可以说“Everything is in the bag. Let's set off!"意思是一切都搞定了，我们出发吧！