all alone
1.by oneself;independently自己;独立地
He has completed the task all alow.他独立完成了这项任务。
2.being the only one;without others独自地;孤零零地
The small cabin stands on the hillside all alone.那房子孤零零地座落在山坡上。
She sat in her room reading all alone.她独自坐在房里看书。