常見例句用作名詞 (n.)The time it takes for half of its original amount to decay is called the half-life.衰變至只剩下原來數(shù)目一半所需的時(shí)間稱為該核素的半衰期。It is not necessary to wait until half of a sample has decayed in order to measure the halflife.不必一直等到樣品衰變一半之后才測(cè)量它的半衰期。 返回 half-life