This article reviews the latter-day submarine sinkings, and introduces the overseas submarine rescue ship and submarine rescue methods.

文章主要对近代潜艇失事事件作了大致的回顾，并对国外援潜救生船及援潜救生手段作了介绍。

The paper forword a mathematical model of stream function for sinkings with no internal mandrel and applies the upper bound approach principle to make further deduction and calculation.

对无芯棒缩管提出了流函数的数学模型，应用上限原理加以推导和数值运算。

Few people realise, said Watson in London before setting off for the Antarctic, how dirty this old-fashioned sea war can get, with hand-to-hand combat, collisions, bombardments and sinkings.

沃森动身去南极前在伦敦说，很少人能明白这种老式的海上战斗有多残忍：面对面搏斗、冲撞、炮击、沉船。