half-life

音標(biāo)發(fā)音

• 英式音標(biāo) [?hɑ?f.la?f]
• 美式音標(biāo) [?h?f.la?f]
• 英式發(fā)音
• 美式發(fā)音

基本解釋

• n.半衰期

同根派生

• half-life相關(guān)詞

英漢例句

用作名詞 (n.)

• The time it takes for half of its original amount to decay is called the half-life.
  衰變至衹賸下原來數(shù)目一半所需的時間稱爲(wèi)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後才測量它的半衰期。

• half-life更多例句

英英字典

劍橋英英字典

• the length of time needed for the radioactivity of a radioactive substance to be reduced by half

• half-life劍橋字典
• half-life柯林斯字典