They have also been fitted under some helicopters, and development work in this area continues.

有些气囊也已被安装在了一些直升机的下部，这方面的开发工作目前正在进行当中。

youdao

Under the new circumstances, the regional development of the Tumen River area is especially important.

在新形势下，图们江区域合作开发工作尤为重要。

youdao

Under the new circumstances, the regional development of the Tumen River area is especially important.

在新形势下，图们江区域合作开发工作尤为重要。

youdao