instantaneous

1. ADJ Something that is instantaneous happens immediately and very quickly. 即刻的

Death was not instantaneous because none of the bullets hit the heart. 因为没有一颗子弹射中心脏，所以没有即刻死亡。

2. instantaneouslyADV 即刻地[ADV with v]

Airbags inflate instantaneously on impact to form a cushion between the driver and the steering column. 安全气囊在碰撞时立刻膨胀，在司机和方向盘之间形成一个缓冲。