One day Deb heard a baby bear outside her window. She thought its mother was nearby, so she left it alone.

一天，黛玻听见窗外有一只熊宝宝在叫，她以为熊妈妈应该就在附近，所以没理会它。

youdao

Of course! Maybe another person had thought it was a play toy and brought it home with him or he left it alone and someone else took it, but he didn't know who.

当然啦，也许别的人以为那是玩具，就把它带回家，或是他随便放，不晓得谁把它拿走了。

youdao

It happened—whether by accident or design —that the two of them were left alone after all the others had gone.

碰巧—不知是偶然还是有意安排—其他人走后，只剩下了他们两个人。

《牛津词典》

Slavery could be left alone in the South until it slowly died.

VOA: special.2009.06.11

"I left it alone, and it turned out to be a bigger mistake than I ever expected, " he said.

WSJ: Investors Find Ways to Cope With Pain of Apple

The unionists argue that the flag has flown for decades above Belfast City Hall and the other parties should have left it alone.

BBC: No mainstream party can wash its hands of flag dispute

Augusta wished to be left alone while it became a power center, capitalizing on a massive, global event.

WSJ: Jason Gay: Augusta Opens a Door