莫名其妙的事 meaning in Chinese

be greek to

A funny thing happened to me today
今天我遇见个莫名其妙的事
Balashov was some ten yards from this majestically theatrical figure in bracelets , feathers , necklaces , and gold , when julner , the french colonel , whispered to him reverentially , the king of naples ! it was in fact murat , who was now styled the king of naples . though it was utterly incomprehensible that he should be the king of naples , he was addressed by that title , and was himself persuaded of his royal position , and consequently behaved with an air of greater solemnity and dignity than heretofore
那人有一副庄重的舞台面孔，带着手镯，项链，满身珠光宝气。果然，这就是那个称作那不勒斯王的缪拉。虽然为什么他是那不勒斯王完全是一件莫名其妙的事，但人们那样称呼他，而他本人也确信这一点，因此显出一副比以前更庄严和了不起的派头。