A：How are the shirts packed?
      衬衫怎样包装？

B：They're packed in cardboard boxes.
      它们用纸板箱包装。

A：I'm afraid the cardboard boxes are not strong enough for ocean transportation.
      我担心远洋运输用纸板箱不够结实。

1. 海洋；大海
    The ocean is the sea.

    e.g. There were few sights as beautiful as the calm ocean on a warm night.
           鲜有景致能与温暖夜色下风平浪静的大海媲美。

2. （五大洋之一的）洋
    An ocean is one of the five very large areas of sea on the Earth's surface.

ocean

    e.g. They spent many days cruising the northern Pacific Ocean.
           他们在北太平洋航行了很多天。
    e.g. ...the Indian Ocean.
           印度洋

3. 许多；大量
    If you say that there is an ocean of something, you are emphasizing that there is a very large amount of it.

    e.g. I had cried oceans of tears...
           我泪流成河。
    e.g. APEC seems be drowning in an ocean of jargon.
           亚太经合组织似乎为一大堆空洞的胡言乱语所淹没。

4. 沧海一粟;九牛一毛
    If you say that something is a drop in the ocean, you mean that it is a very small amount which is unimportant compared to the cost of other things or is so small that it has very little effect on something.

ocean

    e.g. His fee is a drop in the ocean compared with the real cost of broadcasting.
           同播出的实际开支相比较，他那点酬金不过是九牛一毛。