Tritium is one of the mildest radioactive isotopes.氚是最和缓的放射性同位素之一.More reactive are the heavier isotopes of hydrogen, deuterium and tritium.更为活跃的是氢的较重同位素, 氘和氚.Tritium has a half - life of 12.4 years.氚的半衰期为12.4年,地球形成时的氚早已...
Seek common ground on major questions while reserving differences on minor ones.求大同存小异.The market likes the broad outline but is reserving judgment on the fine detail.市场对这一整体设想表示出认可，但在具体细节上还未作出反应。Doctors are reserving ju...
Some people are able to remain sexually abstinent and thus escape all risks .一些人在性的方面能够坚持禁欲并且由此规避所有的风险。Indeed, very many females and males are neither abstinent nor sexually exclusive.真实的情形是, 非常多的男男女女既不禁欲也不性专一.During tre...
阿诺德关掉发动机，下了车。Arnold stopped the engine and got out of the car.灯光有点太刺眼了。你可以把灯关掉。The light's a bit too harsh. You can turn it off.他关掉发动机，抓住系船的绳子。He cut the engine and grabbed the mooring lines....
他们又是跳绳，又是玩接球，等着上课铃声响起。They skip rope and play catch, waiting for the bell.接球手与四分卫将会对换位置。The receiver and the quarterback are going to trade positions.我跳起来接球，结果摔了个跟头。I jumped up to catch a ball and fell over....
他朝着那只鸟射击,但没射中.He shot at bird but he didn't shoot it.他仔细瞄准, 但子弹没射中目标.He took careful aim, but his shot fell short.他朝着一只野鸭射击, 但没射中.He shot at a wild duck, but missed it....