rack的现在完成时怎么写？

n.行李架，支架，刑架，（羊、猪等带前肋的）颈脊vt.使痛苦，使焦虑，剥削，榨取，用刑拘折磨...

rack的音标：rack的英式发音音标为：[ræk]rack的美式发音音标为：[ræk]...

Don't think this job a piece of cake. You'll have to rack your brains once you start on it.别以为这工作是易如反掌的事, 你做了就知道它是很伤脑筋的.Turn the cake the right way up on to a wire rack…把蛋糕翻到合适的方向对准金属丝架上。I took the key for the ...

My rucksack was too big for the luggage rack.我的背包太大了，行李架上放不下。Turn the cake the right way up on to a wire rack.把蛋糕翻到合适的方向对准金属丝架上。The old house soon went to rack and ruin.这所旧房子很快就毁坏了....

rack的现在进行时为：racking...

rack的复数形式为：racks...

rack的第三人称单数（三单）为：racks...

rack的一般过去时为：racked...

“电熔”的拼音为：diàn róng...

“炮兵”的英语可以翻译为：artillery，artillerymen，artillerist，artilleryman，cannoneer ...

n.拳头，手...

“素”的反义词：荤, 艳。...

gibber的音标：gibber的英式发音音标为：['dʒɪbə(r)]gibber的美式发音音标为：['dʒɪbər]...

remarkable的最高级为：most remarkable...

“加入”的反义词：退出。...

“鼹鼠”的拼音为：yǎn shǔ...

“簇虫”的英语可以翻译为：gregarina ...

atheism的音标：atheism的英式发音音标为：['eɪθiɪzəm]atheism的美式发音音标为：['eθiˌɪzəm]...

n.特征函数...

“洗劫”的拼音为：xǐ jié...

迪肯毫不掩饰自己对贝尔顿的憎恶。Deacon made no secret of his loathing of Bayldon.英国队毫不掩饰他们获胜的喜悦。The British team did not disguise their delight at their success.她猜想他正在尽力掩饰笑容。She fancied he was trying to hide a smile....

Used in Italy since the Renaissance, it often assumes the form of a loggia.从文艺复兴时期起就已在意大利使用, 往往采取敞廊的形式....

Mount 马西山（美国纽约州东北部一山），[人名] 马西...