雅各布森得出的结论是基于对钐-147衰变成钕-143所作的分析。Jacobsen based his conclusion on an analysis of the decay of samarium-147 into neodymium-143.与氦 - 4不同之处是, 氦-3不能由放射性衰变产生.Unlike helium - 4, it cannot be produced by radioactive decay.将探测到来自...
他算出了他们活期存款账户上的余额总和。He figured up the balance in their checking account.请查一下我的账户余额。I'd like to check the balance in my account please.总借记和总贷记的结算即账户余额。The sta-tement of total debits and credits is known as a balance....