Your order number will appear at the top of the confirmation email.

您的訂單編號會出現在確認信的最上方。

A warning message appeared on my screen just before the meeting started.

會議開始前，我的螢幕上突然出現一則警告訊息。

The new flight times should appear on the airline's website by Friday.

新的航班時刻應該會在週五前出現在航空公司的網站上。