None of us knows where to find the first-handed materials.

我们都不知道上哪儿去找第一手资料。

youdao

This work provides a basis to study modes conversion in left-handed materials slab waveguide.

这为研究左手材料薄板波导中的模式耦合奠定了基础。

youdao

This paper derived the transfer matrix for the bilayer structure composed of left-handed and right-handed materials.

推导出了由左右手材料构成的双层结构的转移矩阵。

youdao

Along with other educational materials, he handed out over 600 astronomy bookmarks to members of the public in roughly four hours!

WHITEHOUSE: National Mall Opens to Stargazers

Its cargo then will include broken machinery and science materials that need to be handed back to researchers.

BBC: SpaceX lifts off with ISS cargo

The ceasefire resolutions that ended the Gulf war six years ago decreed that stiff economic sanctions would remain on Iraq, including a ban on the great bulk of its oil sales, until it had handed over all its weapons of mass destruction, along with the equipment and materials to build them.

ECONOMIST: That man again