sheath的现在完成时怎么写？

sheath的第三人称单数（三单）为：sheaths...

sheath的一般过去时为：sheathed...

sheath的现在进行时为：sheathing...

Coleorhiza ( pl . coleorhizae ) The protective sheath surrounding the radicle in grasses.胚根鞘:保护幼根的鞘状结构.Conclusion Saber sheath trachea is a sign of rather severe COPD.结论剑鞘气管是较重的copd的标志.Coleoptile A sheath like structure ...

n.护套，鞘，叶鞘，紧身装v.包，盖...

sheath的复数形式为：sheaths...

the sheath around an electric cable电线护皮He drew his sword from its sheath.他拔剑出鞘.This suit of clothing is more inexpensive than that sheath.这套衣服比那套便宜....

sheath的音标：sheath的英式发音音标为：[ʃi:θ]sheath的美式发音音标为：[ʃiθ]...

forget的反义词有：recollect, remember, find。vt. & vi.forget的反义词（忘记;忽略）：recollect, remember。forget的反义词（其他释义）：find。...

铍铜合金的母合金...

“想出”的英语可以翻译为：think out，figure out，dope out...

“沙蚤”的英语可以翻译为：[动] sand hopper，chigoe，redbug，sand flea ...

good night的音标：good night的英式发音音标为：[ɡud nait]good night的美式发音音标为：[ɡʊd naɪt]...

rapture的近义词/同义词有：bliss, elation, delight, ecstasy, joy, glee, happiness, enchantment, elation, enchantment, delight, ecstasy, enthusiasm, joy, bliss, glee, happiness, conjuration, trance。n.rapture的近义词（痴迷;狂喜）：bliss, elati...

n.酒吧间销售酒精饮料的人，酒吧间男招待( bartender的名词复数 )...

目的探讨先天性食管闭锁及气管食管瘘的早期诊断和治疗方法.Objective To explore early diagnosis and treatment of congenital esophageal atresia and tracheoesophageal fistula.目的探讨先天性食道 闭锁 及气管食管瘘的早期诊断及冶疗.Objective To investigate early diagnosis and treat...

backed的音标：backed的英式发音音标为：[bækt]backed的美式发音音标为：[bækt]...

“农”的反义词：工。...

Padmore的音标：...

“叆叇”的拼音为：ài dài ...

Their sole aim is to destabilize the Indian government.他们唯一的目标就是要破坏印度政府的稳定。Bacher professed himself pleased with the Indian tour.巴奇尔表示对印度之行很满意。He was one of the world's foremost scholars of ancient Indian culture......

目的研究垂体后叶素在心肺复苏中的作用.Objective To study the effect of administrating vasopressin on cardiopulmonary resuscitation.与垂体后叶素相比止血效果明显 ( p...

n.斑纹，色斑v.使成杂色，使有斑点( mottle的现在分词 )...