regretably

Regretably I didn't get a picture of him as he disappeared quickly down the line... drat!

可惜由于他太快就在人群消失，我拍他……可恶！

Regretably, I cannot watch the lively scene in the meeting and the presents distributed by companies present at the meeting .

遗此次展会火爆场面和参展商派发赠品。