梦 means dreams.
醒来 means to awaken.
是 has multiple meanings, but it usually means yes if you're answering a question, or it can be used to refer that something is something else.
谁 means who, usually used in a question
在 means to be at.
窗台 means windowsill.
把 has multiple meanings when used with other words. But it is used in a sentence to describe something being moved like 把它拿走(bá tā ná zoú) which means to take it away.
结局 means ending, conclusion.
打开 means to open, usually a box or window.
那 means that.
薄如蝉翼 is used to describe something as being fragile and easily lost.
的 once again, has multiple meanings, it is usually used behind other words, like 美丽(meí lì)的花(huā) which means beautiful flower or 是我的(shì wo3 dè) which means it's mine.
未来 means future.