释义 |
half-times 英'hɑːft'aɪmz美'hɑːft'aɪmz BNC²³⁶²¹³⁺¹ 基本英英例句 半寿期⁵⁰; 半衰期⁵⁰原型half-time的复数 名词 halftime: an intermission between the first and second half of a gameThe time it takes for half of its original amount to decay is called the half-life.衰变至只剩下原来数目一半所需的时间称为该核素的半衰期。 It is not necessary to wait until half of a sample has decayed in order to measure the halflife.不必一直等到样品衰变一半之后才测量它的半衰期。 |