clack的现在完成时为：clacked...

blackbirding的音标：...

未镀锡的黑钢板...

backup的复数形式为：backups...

adj.向后的，倒行的，返回的，落后的adv.向后，往后，倒，逆...

Changing stresses bring about more cracking and rock deformation.不断变化的应力导致更多的断裂和岩石变形。Mark, you'd better get cracking, the sooner the better.马克，你最好尽快开始，越快越好。She set off at a cracking pace to Mr Ramzan's Supersto...

backflooding的音标：backflooding的英式发音音标为：[bækf'lʌdɪŋ]backflooding的美式发音音标为：[bækf'lʌdɪŋ]...

hackneyed的音标：hackneyed的英式发音音标为：['hæknid]hackneyed的美式发音音标为：['hæknid]...

package的复数形式为：packages...

lack的现在完成时为：lacked...

backslide的第三人称单数（三单）为：backslides...

track的近义词有：hunt, explore, track, seek,pursue, follow, chase, hunt, trace, track, trail。下面这些动词均含"搜索，寻找"的含义：hunt：一般指寻找所需的物件，或对罪犯的搜寻，特指追猎。explore：一般指对未知事物或新生事物的探索、观察与研究。track：侧重按一定线索追查出结果。seek：语义庄重，语气强，使用广。多暗示做出很大努力去寻求某人或物。...

playback的复数形式为：playbacks...

hijacks的音标：...

whack的音标：whack的英式发音音标为：[wæk]whack的美式发音音标为：[hwæk, wæk]...

He claims Pasolini overtook and tackled him, pushing him into the dirt.他声称帕索利尼追上去打他，把他推倒在烂泥里。He was rugby tackled by a policeman after breaking through police lines.他在突破警戒线后被一名警察拦截了。They tackled them to the best of their...

n.敲诈，勒索，（盗匪征收的）保护费，免抢税vt.胁迫，勒索，敲诈，讹诈...

You need to grill the tomatoes until the skins blacken.你得把番茄烤到皮变黑为止。They're trying to blacken our name.他们企图败坏我们的名声。Don't blacken my name by spreading rumors.不要散播流言,破坏我的名誉....

n.臀部，背部，后方...

racketeer的复数形式为：racketeers...

unpack的现在完成时为：unpacked...

n.平装本，平装书...

blacksmith的复数形式为：blacksmiths...

backpedal的现在进行时为：backpedaling...

Every minute during the hijack seemed like a week.被劫持过程中，每一分钟都过得如同一周那么漫长。The front page is devoted to the continuing saga of the hijack.头版是对劫持事件的连续报道。Two men tried to hijack a plane on a flight from Riga to Murmansk.两名男子...

sack的一般过去时为：sacked...

packet的近义词有：pack, package, packet, parcel, bunch, bundle。下面这些名词均有"捆，包"的含义：pack：指专为背负而包扎的包裹，也指驮物等。package：指包装整齐严密的包裹或一包、一捆、一盒东西。packet：一般指小件行李、邮包、还可指更小一些的包。parcel：着重指邮包，也指将东西扎成小包或不太大的包。bunch：指有规则地把同类东西固定在一起。bundle：指多件东西被捆...

firecracker的音标：firecracker的英式发音音标为：['faɪəkrækə(r)]firecracker的美式发音音标为：['faɪərkrækə(r)]...

backer的复数形式为：backers...

She was on the company's blacklist.她被列在这家公司的黑名单上.Most credit agencies run a 15-year blacklist effectively barring bankrupts from receiving credit.大多数信贷机构都有一份为期15年的黑名单，以有效阻止破产者得到贷款。Corrected number of laps in Knockou...