backpack的复数形式怎么写？

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Looking back, she feels she should never have hung up her backpack.回首过去，她觉得自己真不该放下背包不再徒步旅行。He squirmed out of the straps of his backpack.他扭动身体，挣开背包的肩带。This suitcase, and a backpack.这个手提箱和背包....

backpack的音标：backpack的英式发音音标为：['bækpæk]backpack的美式发音音标为：['bækˌpæk]...

A backpack is a Viking helmet - neither should be a crowed train.背包像维京海盗的头盔一样,不应该带上拥挤的火车.He squirmed out of the straps of his backpack.他扭动身体，挣开背包的肩带。Looking back, she feels she should never have hung up her backpack.回首过去...

Batnickoin的音标：...

n.水成作用，热液成矿作用...

“宝拉”的英语可以翻译为：[电影]The Color of Pain...

run into的音标：run into的英式发音音标为：[rʌn 'ɪntuː]run into的美式发音音标为：[rʌn 'ɪntu]...

他们要最大限度地榨取英国人的财富。They mean to bleed the British to the utmost.果汁是通过离心力榨取的。The juice is extracted by centrifugal force.这只能为他们提供机会榨取利润.This only gave them opportunity to squeeze profits....

He struggled to hold the bike down on the banked corners.拐过斜弯时他竭力将自行车把稳。Young people came from the four corners of the nation.全国各地的年轻人都来到这里。Salter held the bag by the corners and shook it upside down.索尔特捏住包的外角，把它倒过来晃了晃。...

aeroturbine的音标：aeroturbine的英式发音音标为：[eərəʊ'tɜ:bɪn]aeroturbine的美式发音音标为：[eəroʊ'tɜbɪn]...

ironworks的音标：ironworks的英式发音音标为：['aɪənwɜ:ks]ironworks的美式发音音标为：['aɪərnwɜrks]...

southwest的音标：southwest的英式发音音标为：[ˌsaʊθ'west]southwest的美式发音音标为：[saʊθ'wɛst, saʊ'wɛst]...

herself的音标：herself的英式发音音标为：[hɜ:'self]herself的美式发音音标为：[hɜr'self]...

n.战车的御者...

服务项目包括避孕建议和健康检查，并且免费提供。The service covers contraceptive advice and health checks, and is available free.重点在于通过锻炼促进健康。The emphasis is on developing fitness through exercises and training.奇怪的是，她拼命求生的抗争使得她的健康状况大有好转。Curiousl...

immeasurable的音标：immeasurable的英式发音音标为：[ɪ'meʒərəbl]immeasurable的美式发音音标为：[ɪ'mɛʒərəbəl]...

绝经...

isopropalin的音标：isopropalin的英式发音音标为：[aɪsəprəʊ'pælɪn]isopropalin的美式发音音标为：[aɪsəproʊ'pælɪn]...