早知文理百科

has been opened。 现在完成时，但一般都这么说have/has done，have/has been done，是现在完成时的被动语态。 Digital television has been around for som...

curable adj. 可治愈的；可医治的；可矫正的； 例句 Most skin cancers are curable if treated early. 如果及早治疗，多数的皮肤癌是可治好的。 Many infe...

intervention是可数的，复数形式是interventions.意思是干预、干涉。 例句 Other interventions are less admirable. 其他一些的经济干预措施也不太明智。 ...