The grand opening hit a snag when no one could find the key.盛大的开幕典礼上出了个小小的意外: 谁也找不到那把钥匙。The store offered deep discounts during the grand opening sale.在开业大酬宾期间，这家商店打折力度很大。In celebration of the store's grand opening, we're offering free balloons for the kids.为庆祝本店盛大开业，我们向小孩子分发免费气球。