例句：
The waste was dumped in the sea .
廢物倒入海中。
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.
他看著眼前這笑臉的海洋。
The sea covers nearly three-fourths of the world's surface.
海洋幾乎占地球表面的四分之三。
The small craft was exposed to the danger of the open sea.
那只小船曾經歷了在空曠的海洋里穿行的種種危險。