Objective: To study the features of blood cell component and blood rheology of sailors in naval ship and nuclear-powered submarine after long term voyage and their significance in health.

目的：了解水面舰艇和核潜艇长期航行对艇员血液细胞成分和某些流变学指标的影响特点，探讨这些影响对艇员健康的意义。

American carriers travel with an unseen companion: at least one nuclear-powered attack submarine.

美国航母有水下隐形群组伴随：至少一艘核动力攻击潜艇。

Over the past two years, it has deployed at least one of a new type of nuclear-powered ballistic-missile submarine called the Jin class and it may deploy as many as five more.

在过去的两年里，它开发出至少一种新型的核动力弹道导弹潜艇，称为“晋”级，并且可能开发出大约五种以上。