"heavy seas"
误 The knowledge sea is deep and broad.
正 The sea of knowledge is broad and deep.
析sea不受其他名词修饰,但sea of可修饰其他名词,如 a sea of faces (无数面孔), a sea of troubles (无穷的麻烦), a sea of red flags (红旗似海)等,都是形容数量之多。
他到海边度假去了。误 He went to sea for his vacation.
正 He went to the sea for his vacation.
析 go to the sea(= go to the seaside)表示“到海边去”, go to sea(= become a sailor)表示“出海,当水手”。
我们经常在海里游泳。误 We often swim on the sea.
误 We often swim at sea.
正 We often swim in the sea.
析 “在海里游泳”是swim in the sea, at sea指在海上航行, on the sea指“在海上,在海边”。
大约四分之三的地球被海水覆盖。误 About three quarters of the Earth is covered by seas.
正 About three quarters of the Earth is covered by sea.
析sea表示“海水”时为不可数名词; 但当 sea 作“海浪”或“汹涌的波涛”解时多作复数。
我不懂这问题,我茫然不知所措。误 I can't understand this problem; I'm all at the sea.
正 I can't understand this problem; I'm all at sea.
析sea 往往和all 或completely连用,构成 be all〔completely〕 at sea的结构,表示“茫然”“摸不着头脑”, sea前面不加冠词。