Porcupines use their spines to protect themselves.豪猪用身上的刺毛来自卫。The cactus has spines.仙人掌有刺.Spines - this expression has been used by various writers with considerable latitude.刺,许多作者把这个词用在相当广泛的含义上....
Complete the following sentences by filling the blanks with proper prepositions and adverbs.用适当的冠词和副词填空, 完成下列句子。Prepositions and conjunctions are particles.介词和连词是小品词.Many prepositions are used adverbially in English.在英语里...
He could become ungraciously immodest about his own capacities.谈及自己的能力，他会自吹自擂大言不惭。It was not, however, what would have been called an immodest glance.不过, 这又不是通常说的那种轻佻的目光.Many old people find the bikini immodest.许多老年人感到穿比...
Drunkard sees affordthe opportunity , enter whereaboutldirection barkeeper to enquire: What are 3 your difficult problem?酒鬼见机不可失,便进去向酒保询问: 你的三个难题是什么 呀 ?Drunkard sees affordthe opportunity , enter whereaboutldirection bar...
在相同的条件下,分子速度分布在任何时候都是恒定的.At any given instant the distribution of molecular speeds is always constant under the same conditions.它使火车在通过现有轨道的弯曲处时得以保持恒定的车速。It allows the train to maintain a constant speed through the twist...
大多数海洋腹足纲软体动物在某些幼体阶段形成一种有纤毛的游泳器官。Most marine gastropod mollusks develop a ciliate swimming organ in certain larval stages.因此,研究者转向研究缺乏纤毛的突变异种老鼠的细胞.So the researchers turned to mutant mice with cells that lacked cilia.目的了...