The banner outside the convention center flapped loudly in the strong afternoon wind.

會展中心外的布條在下午的強風中劈啪作響地拍動著。

During the outdoor product launch, our printed agenda kept flapping and nearly blew away.

在戶外產品發表會上，我們印好的議程表一直被風吹得啪啪作響，差點飛走。

The loose tarp on the delivery truck was flapping, so the driver stopped to secure the cargo.

送貨卡車上鬆脫的防水布一直在拍打，所以司機停車把貨物固定好。