undercast

地下气道

发音

US

词形变化

undercasts 复数 undercasts undercasting undercasts 三单 undercasting 现在分词 undercasted 过去式 undercasted 过去分词

释义与例句

n.
  1. 1.

    An unbroken or nearly unbroken cloud layer below the point of observation.

    可数 不可数 气象

    Undercast is common on Mount Washington.

  2. 2.

    An air-passage crossing a road in a mine by means of an airtight box or channel beneath it.

    可数 不可数 商务 采矿
v.
  1. 1.

    To allocate the parts in (a play or film) to insufficiently skilled actors.

  2. 2.

    To throw under or beneath.

词源

From Middle English undercasten, equivalent to under- + cast.

来源：wiktionary