請問dream應該翻譯成"夢"還是"夢想"怎麼區分?

My dream is become a scientist

My dream is becoming a scientist.
or
My dream is to become a scientist.

"Dream" can be verb or noun.

Ex. I dreamed a dream last night.

I had a dream last night.

I dreamed of you last night.

You were in my dream last night.I dream of becoming a scientist.

2012-02-08 16:44:08 補充：
夢---是在下意識的情況下(睡覺時)發 生的,當事人無法控制其內容
夢想---是在有意識的情況下發 生的,當事人意識清醒時對人事物的愛好嚮往進而
追求

I have a dream by Martin Luther King speech Aug. 28, 1963
http://abcnews.go.com/Politics/martin-luther-kings-speech-dream-full-text/story?id=14358231&page=2

2012-02-10 13:31:53 補充：
常常搞不清楚是要翻譯成 "夢"還是翻譯成"夢想"？
至於是要翻譯成夢還是夢想,那要看上下文才能決定.

2012-02-10 13:38:48 補充：
You are welcome. Prisoner. I think i've learned more from you.

''夢''本身最大ㄉ意義是晚上睡覺時人潛意識所浮現出ㄉ景象
而''夢想''則是你希望.願望
''我的夢想是成為一位科學家''要翻成''I dream to be a scientist''
而不是''My dream is become a scientist''
因為''dream''在這個句子裡意思是夢想
而夢想有希望ㄉ意思在裡面~
''我的夢想是成為一位科學家''也可說成''我希望成為一位科學家''

圖片參考：http://imgcld.yimg.com/8/n/AC08062432/o/101202080097513871680680.jpg

要努力呦~~:))

我的夢想是成為一位科學家
My dream is to become a scientist
dream可以當夢也可以當夢想
在這句是當夢想

My dream is to become a scientist.
my是所有格形容詞,放在名詞之前.
to become a scientist是不定詞片語當主詞補語,必須寫出to來
my dream = 我的夢想 = 我的願望
如果是翻成{我的夢],就變成真正是作過的夢了.

A nightmare is a dream even thouth it's a bad one.What you wish to be in the future is your dream not your nightmare.
Learn Chinese with me, You Majesty :P

2012-02-08 10:39:40 補充：
How about your parents?
You the third generation of Chinese?

"夢"跟"夢想"要怎麼區分？

2012-02-08 09:30:21 補充：
I would rather doing it with my grandma!

2012-02-08 21:30:45 補充：
Good Jose, thanks a lot. I did not realize such diff between "夢"跟"夢想" in Taiwanese.

English seems unable to tell 'dream' and 'desire' apart.