In the unlikely event of a tie, the House selects the president and the Senate the vice president.

万一出现平局，由众议院选出总统，参议院选出副总统。

In the unlikely event of a fire, passengers should move to the top deck.

【unlikely】万一发生火警，乘客应转移到顶层甲板上。

In the unlikely event of the aircraft having to make an emergency landing, you will be told to adopt this protective brace position.

如果遇到紧急情况飞机需要迫降时，请您采取以下的支撑保护姿势。

The A350 is amazing, in the (unlikely) event of both engines stopping, the aircraft will  automatically start the auxiliary power unit, put the aircraft into a descent and begin Wind-milling  start attempts on both engines.

A350 是惊人的， 在（不太可能）两个引擎都停止的情况下，飞机将自动启动辅助动力装置， 使飞机下降并开始尝试在两个引擎上进行风车启动。