black alum

基本解釋

In potash it turns black, but in alum nothing happens until you bring it to the boil, then purple colour comes flooding out.
在碳酸鉀中，它變成黑色，而在明礬中一開(kāi)始卻什么反應(yīng)都沒(méi)有，直到煮沸后紫色都溢出來(lái)了。
The latest ones who were recently tapped to salute the late King of Pop at the upcoming gig are R&B quartet Black Eyed Peas and "American Idol" alum Jennifer Hudson.
最新的那些最近被請(qǐng)來(lái)已故國(guó)王致敬的流行音樂(lè)會(huì)是在即將到來(lái)的黑眼豆豆R&B四重奏“美國(guó)偶像”的明礬珍妮弗哈德森。
christina-china.com
Four prototype HALTT (“Helicopter Alert and Threat Termination“) sensors are now on board Black Hawk helicopters and deployed to Afghanistan, as Danger Room alum Nathan Hodge reports.
四件HALTT（直升機(jī)預(yù)警與威脅解除）傳感器樣件目前已裝在黑鷹直升機(jī)上，應(yīng)用于阿富汗，如險(xiǎn)情辦公室Nathan Hodge所報(bào)道的。