D ring is not a necessary backing part which has biological activity in these compounds.

环不是该类化合物具有生物活性的必需骨架部分。

youdao

D isometric view for total immersion into the ring.

三维等距的看法总沉浸到环。

youdao

You "d better ring me first just in case."

以防万一，来之前最好先打个电话。

youdao

D-ring closure at side tie.

由于在一边关闭的领带。

youdao

D-ring closure at side tie.

由于在一边关闭的领带。

youdao