For some obscure reason, the group is very popular.

【obscure】这个组合莫名其妙地很受欢迎。

Archer understood that he ran the risk of having his mandate withdrawn, and for some obscure reason he disliked the prospect.

阿切尔明白他冒着撤回授权的风险，出于某种不明原因， 他不喜欢这种前景。