Sent_en: 2zh Three days after a US Navy helicopter collided with a US Coast Guard airplane off the coast of California, a search and rescue mission is ongoing for the nine crew onboard the two aircraft.
Sent_yy: 一架美国海军直升机与一架美国海岸警卫队飞机在加利福尼亚海岸相撞三天后，寻找两架飞机上的9名乘员的搜救行动正在进行中。