backpack的复数形式为：backpacks...

Tack the cord around the cushion.用粗线沿着垫子边绷一圈。In desperation I changed tack.我走投无路，于是改变了策略。Tack them together with a 1.5 cm seam.用1.5厘米的针脚将它们暂时缝上。...

n.（画等的）背景，底色，背景资料，配乐...

微组装...

package的一般过去时为：packaged...

It has a music and flats . It is a martial music. It has a jackboot rhythm.它的乐曲不分升凋降调, 是一首军乐曲, 是长简靴的节奏....

jack的复数形式为：jacks...

anti-black的音标：...

attacked的音标：...

You can always fall back on him when you are in difficulties.你碰到困难时总是可以求助于他.Doctors sometimes fall back on old cures.有时医生们求助于老的疗法.When necessary, instinct is the most reliable resource you can fall back on.必要时，最保险的办法就是凭直...

bushwhack的一般过去时为：bushwhacked...

backsight的音标：backsight的英式发音音标为：['bæksaɪt]backsight的美式发音音标为：['bæksaɪt]...

backlight的现在进行时为：backlighting...

tackle的第三人称单数（三单）为：tackles...

blacken的音标：blacken的英式发音音标为：['blækən]blacken的美式发音音标为：['blækən]...

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

packer的音标：packer的英式发音音标为：['pækə(r)]packer的美式发音音标为：['pækɚ]...

The executives decided to turn over this company to Mr. Ackerman.执行委员决定把公司移交给阿克门先生.Mr. Ackerman lay down.阿克曼先生躺了下去.Ackerman, L . Skin and Haircoat Problems in Dogs.阿克曼, 油菜皮肤haircoat问题狗....

tackle的音标：tackle的英式发音音标为：['tækl]tackle的美式发音音标为：['tækəl]...

backactor的音标：backactor的英式发音音标为：[bæ'kæktə]backactor的美式发音音标为：[bæ'kæktə]...

v.在丛林中开路，在丛林中伏击...

pack的现在进行时为：packing...

The hare could find no safety, a pack of jackals had it in the wind.野兔无处逃生; 一群豺狗在追踪它.Who can tell me how those jackals knew where to bite Johnny Tapia?谁来告诉我这些条子是怎么得到消息的?I have become a brother to jackals And a companion ...

vt.梳理，乱砍n.锯齿形，颈上的羽毛，针排...

backwoodsman的复数形式为：backwoodsmen...

n.精装书，精装本，硬封面的书adj.精装的，硬封面的...

v.偷懒( slack的现在分词 )，减速，放松...

抹墙粉于…...

n.（尤指北美的）远离城镇的森林地带，落后的边远地区...

knockback的音标：knockback的英式发音音标为：[nɒk'bæk]knockback的美式发音音标为：[nɒk'bæk]...