The engine cracked on the first test flight.

在首次试飞时，发动机发生裂纹。

youdao

They didn't even have time to celebrate when the first test flight of the multicopter went well.

他们甚至没时间去庆祝飞机“首航”成功。

youdao

The first test flight will be toward the end this year, according to André Borschberg, the chief executive of the project.

据本项目的首席执行官André Borschberg透露，”太阳动力号“的首次试航预计在今年年底。

youdao

Three astronauts were named for the first manned Apollo test flight: Virgil Grissom, Edward White and Roger Chaffee.

VOA: special.2009.07.08

The first test flight in Japan was Sunday, All Nippon Airways officials said.

CNN: SHARE THIS

Although he has flown HB-SIA in a simulator, Mr Borschberg says he will not really know how it performs until the first test flight later this year.

ECONOMIST: Solar-powered manned flight

This year, China has passed several milestones in developing military technology that could be used in these areas: It conducted the first test flight of a stealth fighter prototype in January and began sea trials of its first aircraft carrier in August.

WSJ: Beijing Launches GPS Rival