owing to和owning to 有什麽區別嗎？

Owing to certain unforeseen circumstances,we failed to start yesterday.（原因狀語）由於某些未能預見到的情況,我們昨天未能出發.

own to是承認有的意思，做謂語動詞

I must own to a feeling of anxiety.

我承認我憂心忡忡。

owning只不過是現在分詞形式