n.缺乏，不足，没有( lack的名词复数 )v.缺乏，缺少( lack的第三人称单数 )...

New blackboards have been fitted up in all the classrooms.教室里都安装上了新黑板.How many blackboards are there in this room?在这个房间里有几块黑板?Some cleaned the blackboards, others mopped the floor.有些人擦黑板, 有些人拖地板....

Pollack的音标：Pollack的英式发音音标为：['pɒlək]Pollack的美式发音音标为：['pɒlək]...

int.悲哉！哀哉！...

n.[历史]绑架黑人卖作奴隶...

黑外...

blackballs的音标：...

adj.松（弛）的，清淡的，不活跃的，懈怠的v.懈怠，偷懒，减速，放松n.宽松裤，（绳索等）松弛部分，煤屑，（人员、资金或地方的）富余的部份...

adj.无精打采的，不决断的，不热心的adv.无精打采地，不决断地，不热心地...

n.黑色的雄松鸡...

Simon allowed his pace to slacken.西蒙放慢了脚步。Muscles stretch, slacken and relax during child-birth.生孩子的时候，肌肉会拉抻、放松，然后松弛下来。We've been really busy, but things are starting to slacken off now.近来我们的确很忙，不过现在情况开始有所缓解了。Inflat...

A blackbird flew down and perched on the parapet outside his window.一只乌鸫飞下来，停在他窗外的矮墙上。The blackbird's nest contained four eggs.黑鹂巢里有四个蛋.The blackbird had a quick, wary look in case the cat was anywhere around.这只乌鸫迅速...

clacked的音标：...

int.呜呼，哀哉...

blackout的音标：blackout的英式发音音标为：['blækaʊt]blackout的美式发音音标为：['blækˌaʊt]...

黑点（镀锡板缺陷），黑斑，盲点，斑痕...

His cheeks were spotted with blackheads.他的双颊上长了一些黑头。Never squeeze blackheads, spots or pimples.千万不要挤黑头、小肿块或粉刺。Ground radish seeds formed into paste and mixed with water remove blackheads.地面萝卜种子形成贴和与水混合删除黑头....

n.黑胡椒...

n.听差，男仆（通常穿制服），卑躬屈膝的人，被待为奴仆的人...

Blackbirds were sitting at the tops of trees singing.乌鸦停在树梢鸣叫着.Blackbirds and thrushes are songbirds.黑鹂和鸫.The blackbirds were whistling in the garden.山鸟在花园里婉转地鸣叫着....

blackfellow的音标：blackfellow的英式发音音标为：[b'lækfeləʊ]blackfellow的美式发音音标为：[b'lækfeloʊ]...

v.偷懒( slack的过去式和过去分词 )，减速，放松...

blackbird的复数形式为：blackbirds...

Freight-car loadings continue to slack off.火车货运的运输量继续减少。The boy's jaw went slack.男孩张大了嘴巴。Many publishers have simply become far too slack.许多出版商就是变得过于懈怠了。Envelope the yarn at night slack month spring, Ping is svelte....

blackband的音标：blackband的英式发音音标为：[b'lækbænd]blackband的美式发音音标为：[b'lækbænd]...

The radio blackout ends as the spacecraft slows down.随着航天飞机减慢速度,无线电通信又重新恢复....blackout curtains.遮光幕帘A technique to prevent this is load shedding by rolling blackout or voltage reduction brownout.一种技术,以防止这种情况是由轧制负荷减少停电或电压...

antiblackout的音标：antiblackout的英式发音音标为：[æntəb'lækaʊt]antiblackout的美式发音音标为：[æntəb'lækaʊt]...

blackouts的音标：blackouts的英式发音音标为：[b'lækaʊts]blackouts的美式发音音标为：[b'lækaʊts]...

黑矿层...

n.蟑螂...