all by himself

基本解释

Now he's going to America all by himself.
現在，他自己一個人要到美國去了。
I doubt that he created the degree all by himself.
我懷疑那種他學位造假的說法。揭示一下：兩個都是“懷疑”，suspect是肯定——懷疑有什麽事，doubt是否定性質疑某件事。
That means Yao attracts a major market all by himself.
這代表著姚明一個人就吸引了一整個市場。

"If Madoff acted alone, it would all end right now. There is no way this kind of operation could have taken place all by himself."
Maybe there is no music, so it's just kind of dancing in the middle of a cookie sheet all by himself.
可能會沒有音樂，也許衹是在衆多餅乾人中間,單純地跳舞。
哈彿公開課 - 計算機科學課程節選
The hoplite himself is marked by, first of all, the shield and second of all, as we continue to think about his defensive capacities, he has a certain amount of armor to protect his body.
重裝步兵的標志,首先就是盾牌,其次,和我們將要說到的防禦力有關,就是士兵的身躰有一定程度的護甲保護
耶魯公開課 - 古希臘歷史簡介課程節選

All the students left the music room, but my brother stood there all by himself.
NPR: Literature and Lullabies from the 'Axis of Evil'