喜樂美語
  1. 1

    Permafrost is a layer of soil that stays frozen all year in very cold parts of the world — the far north, for example. The top may a little in summer, but the ground below stays ice. It is a geography and science word, not everyday chat, unless people are talking about climate. When the air gets warmer, permafrost can thaw. That matters because old ice, gas, and plant matter are trapped in it, and buildings that sit on it can shift if it melts. The name is a blend: always-there frost, in the ground, not the white dust you see on grass on a cold morning.

    永久凍土

    例句逐字對照、搭配詞、易混淆字

    這一義的完整解析還沒打開。訂閱後可以看到例句怎麼拆、常跟哪些字一起出現， 以及容易跟它搞混的字。

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組成From perma- (a short form of permanent, “lasting always”) + frost.

同家族的字

  • frostthe second half: frozen water
  • permanentperma- is a short form of this: lasting always

原始詞典資料1 筆記錄

以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。

permafrostnoun/ˈpɜːməˌfɹɔst/

  • 1

    Permanently frozen ground, or a specific layer thereof.

    • Nevertheless, the water molecule is present, as ice, in a solid form in frozen soils or permafrosts, which cover large regions characterised by a polar climate.
    • In agreement with our overall trends within the permafrost samples, lower nirK and nirS and higher nosZ diversity have been identified in cryoturbated peat vs. unturbated peat soils (Palmer and Horn, 2012).

資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。