Stratification in polar water normally is weak and transient.
極地水域的成層性是微弱而暫時(shí)的。
Stratification in polar waters normally is weak and transient.
極地水域的成層性是微弱而暫時(shí)的。
The stratification of beach deposits has been studied particularly.
對(duì)海灘沉積物的層理進(jìn)行了著重研究。