hack的音标：hack的英式发音音标为：[hæk]hack的美式发音音标为：[hæk]...

A burro is carrying salt of one large bag backcross a river.有一头驴子驮着一大袋子盐过河.The method can be conveniently applied to practical backcross breeding programs.该方法可以很方便地应用于实际的回交育种....

slack的现在进行时为：slacking...

backcross的一般过去时为：backcrossed...

black的现在完成时为：blacked...

后墙...

n.包装机，罐头食品工人，赶牲口运货的人，打包机...

Corporate backbiting is nothing new.在公司里，背后说人坏话并非什么新鲜事。You should refrain your tongue from backbiting.你不要背后诽谤人.Refrain your tongue from backbiting.不要在背后中伤人家....

black的复数形式为：blacks...

n.硬砂岩...

adj.有裂缝的，声音沙哑的，精神失常的v.破裂，崩溃(crack的过去分词)，发沙哑声...

n.黑颜料( black的名词复数 )v.弄脏( black的第三人称单数 )，使变黑，抵制，把黑油彩抹在（演员）脸上...

He gave the donkey a whack across the back with his stick.他拿棍子朝驴背上狠狠打了一下。The majority of people in this country pay their whack.该国大部分人尽了他们的一份力。We need to win a fair whack of the contracts.我们需要赢得这些合同中的相当大的份额。...

backdrop的复数形式为：backdrops...

background的反义词有：foreground, forehand。n.background的反义词（背景;幕后）：foreground。background的反义词（其他释义）：forehand。...

unpacking的音标：unpacking的英式发音音标为：['ʌn'pækɪŋ]unpacking的美式发音音标为：['ʌn'pækɪŋ]...

slack的最高级为：slackest...

v.噼啪响( clack的过去式和过去分词 )...

diamondback的音标：diamondback的英式发音音标为：['daɪəməndbæk]diamondback的美式发音音标为：['daɪəməndˌbæk]...

snack bar的复数形式为：snack bars...

n.背( back的名词复数 )，背面，（椅子等的）靠背，后部v.（使）后退， （使）倒退( back的第三人称单数 )，支持，作…的衬里，（用证据或理论来）证实（一种理论或主张）...

来回地，一来一往...

n.（无比较级）向后，相反，倒，回顾...

The comeback of all comebacks began in the 54 th minute.复出所有复出,开始在第54分钟.Career comebacks from disaster are both difficult and, oddly, easy.失败后东山再起既困难又容易(后面一点有些奇怪).Tennis has had a surplus of comebacks.网球球员复出的例子比比皆是....

package的复数形式为：packages...

Kaolin forms pseudo - hexagonal plates, often regularly arranged in book - like or vermicular stacks.高岭石呈假六边形片体, 往往以书页 状 或蠕虫状规则排列.These stacks of thylakoids are called grana.这些成堆的类囊体称为质体基粒.Judge Stacks was appointed to o...

background的复数形式为：backgrounds...

I go back on the dole when the shooting season's finished.狩猎季节过后，我又重靠领取救济金过活。I give you my word and I'll never go back on it.一言为定,决不反悔.Did he have the nerve to go back on his word?他竟有脸赖账 吗 ?...

crack的近义词/同义词有：shot, blow, bang, break, slit, open, split, snap, explosion, flick, unscramble, slap, craze, fissure, hit, bang, accomplished, noise, break, whack, open, gulf, proficient, thunder, split, blow, opening, fr...

mackintosh的复数形式为：mackintoshes...