ETA：（航班等的）预计到达时间

全称：estimated time of arrival

英文释义：(the time at which an aircraft, a ship, etc. is expected to arrive) .

ETD：（航班等的）预计离开时间

全称：estimated time of departure

英文释义： (the time at which an aircraft, ship, etc. is expected to leave) .

参考双语例句：

With the implementation of the system, UNLB now has the capability to ensure flights are flown in accordance with air tasking orders, expressed in terms of estimated time of departure and arrival, and ensure that air assets are fully utilized in accordance with the terms and conditions of contractual arrangements.

随着这套系统的实施，后勤基地现在有能力确保根据飞行任务单来安排航班，并以出发和到达的估计时间来表示，同时能确保空中资产根据相关合同安排的条款及条件来加以充分利用。

Our service includes airport pick-up during daytime (07:00 -19:00) after that has a charge usd 15; for that purpose you should email us details of your point of origin, airline, flight number, and estimated time of arrival in Guayaquil.

我们的服务包括机场接机服务;为此目的，你应该给我们发电子邮件你的原点的详细信息，航空公司，航班号，并在抵达瓜亚基尔的时间估计。