Ringed seal pups are reared in snow dens.

环斑海豹通常在洞穴的底部生育。

A ringed seal scans for polar bears before snatching a breath.

一头呼啸的海豹在搜寻北极熊的踪迹，以便出来透口气。

The bears are slowly congregating along the coast, anticipating the winter freeze of Hudson Bay when they can get onto the ice and hunt their favorite meal of ringed seal.

这些北极熊在冬天慢慢地聚集到岸边，因为他们能在寒冷的冰层上猎到自己的美味——环斑海豹。

There was a new ringed structure on the driven pan to push back the oil and we also used single framework with one O ring instead of double framework to seal the oil.

在提前器从动盘上设计了一个挡油环形结构，并将原来的双骨架密封结构改为单骨架结构加O型圈密封结构。