1. In the 1970s, there were several incidents of skyjacking, causing a lot of concern for airline security.
在20世纪70年代发生了几起劫机事件，给航空安全带来了很大的关注。
2. The skyjacking of Flight 123 was a highly publicized incident that resulted in a tragic loss of life.
123航班的劫机事件在媒体上备受瞩目，导致了悲剧性的生命损失。