1.Now, scientists have launched a new search to find out if there is... anybody... out there.
launch發起
Heavy fighting has been going on after the guerrillas had launched their offensive...
游擊隊發起攻擊后,激烈的戰斗一直持續不斷 。
2.She said this science is now no longer fiction, but "almost mainstream".
mainstream 主流
The show wanted to attract a mainstream audience.
演出希望能夠吸引主流觀眾 。