This is the 18582nd most frequent Korean word.
시험발사에
"시험발사에" means "in a test launch" in English.
In this sentence, '시험발사에' (test launch) is used to denote the completion of a testing phase for a rocket's functionality.
이 로켓은 이번 달에 시험발사에 성공했습니다.
This rocket successfully completed its test launch this month.
Here, '시험발사에' (test launch) is used to indicate an event where individuals, in this case scientists, were participating.
시험발사에 참여한 과학자들은 환호했습니다.
The scientists involved in the test launch cheered.
In this sentence, '시험발사에' (test launch) references a specialized activity for which preparations or technology development is underway.