light water

短语

[化] 轻水

释义与例句

n.
  1. 1.

    Any water molecules (H₂O) containing two protium (¹H, hydrogen-1) atoms.

    Water in its usual form (as occurs in nature without human intervention), which is mostly of such form.

    不可数 化学
  2. 2.

    Any water molecules (H₂O) containing two protium (¹H, hydrogen-1) atoms.

    Water which has had even the usual small amount of deuterium removed (by human intervention): deuterium-depleted water.

    不可数 化学
  3. 3.

    Foam formed by water and any of various additives, used in firefighting because it floats on flammable liquids lighter than water. (The additives were originally fluorocarbon surfactants but today are increasingly fluorine-free.)

    不可数

词源

By reference to atomic weight and atomic mass; more at light hydrogen.

来源：wiktionary