Marine reef ecologist Scott Porter works to remove oil from his hands in the Gulf of Mexico south of Venice, Louisiana.
路易斯安那威尼斯南墨西哥湾，海礁生态学家斯科特·波特费力地清除手上的石油。
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The air play caused by air cavity sometimes blocks up flowing of liquid such as fuel oil in marine piping , and brings some unfavorable influence for works.