Tetravalence
(=tetravalency)四價
??? 情景例句
One o'clock.
一點鐘。
To err is human; to forgive, divine.
人難免錯誤，寬恕別人是神圣的。
but favourite eating varieties like cod and skate which grow to unnatural sizes,
而是深受人們喜愛的食用魚品種，如鱈魚和鰩魚，只不過它們長得出奇地大，