铑

We study feature of stable and existing zones of multiple-composition natural gas hydrate in seafloor sediments.

本文研究了多组分天然气在海底沉积层中稳定区和存在区的一些特点。

It is written on the T-shirt of US Marine, which is supposed to be the elite of American troops (consisting of troop, aire force and navy).

这句话写在美国海军陆战队的T恤衫上。