r. in some unspecified way or manner; or by some unspecified means
r. for some unspecified reason;
adv. 不知何故
1. I lost my keys, but somehow I found them again.
我把钥匙丢了，但不知怎么的我又找到了它们。
2. She was tired, but somehow she managed to finish her work.
她很累，但不知怎么的她还是完成了工作。
3. Somehow, we ended up at the wrong restaurant.
不知怎么的，我们来到了错误的餐厅。