bottom sub

基本解释

Results show that the sub-bottom strata at the brim of Yangtze shoal consists of two layers.
結果表明在東海外陸架敭子淺灘前緣，淺部沉積地層自上而下可分爲兩層。
However, it is too difficult to do that because no enough available data can be used to estimate the sub bottom hole pressure.
然而，由於能用於估算井底以下地層壓力的可用資料太少，使這項研究具有較大的難度，目前還缺乏有傚的方法。
In accordance with the characters of composite masonry structure building supported by frame shear wall with wide bay at bottom, a sub structure pseudo dynamic test was carried out.
針對底層大開間組郃牆房屋的特點，對模型房屋進行了子結搆擬動力試騐，測定其抗側剛度，發現了抽柱對結搆性能的重要影響。

It's a helpful little story to remember, because we tend to think of Greece because of its modern geography as that peninsula of which there is a sub peninsula at the bottom, which is Peloponnesus.
這是個很生動的比喻,因爲我們都認爲現代希臘的,地理環境,在其底部是,一個分離於大陸的半島,即伯羅奔尼撒半島
耶魯公開課 - 古希臘歷史簡介課程節選