例句：
The waste was dumped in the sea .
废物倒入海中。
The wreck is lying at the bottom of the sea.
沉船躺在海底。
He looked down at the sea of smiling faces before him.
他看着眼前这笑脸的海洋。
The sea covers nearly three-fourths of the world's surface.
海洋几乎占地球表面的'四分之三。
The small craft was exposed to the danger of the open sea.
那只小船曾经历了在空旷的海洋里穿行的种种危险。