The bathyal - abyssal facies , littoral facies , neritic facies and delta facies are beneficial to and gas exploration.半深海 - 深海相区 、 滨浅海相区和三角洲相区是较为有利的油气分布区....

adj.半深海（底）的...

bathyal的音标：bathyal的英式发音音标为：['bæθaɪəl]bathyal的美式发音音标为：['bæθaɪəl]...