请保持地方清洁, 并于使用后把所有废物带离中心.Please keep the place clean, and throw away any garbage.椭圆越扁平,两焦点之间的距离越远,每个焦点离中心的距离也越远.The flatter the ellipse the farther apart the foci and the farther each focus the center....
云仙山今天一直在向外喷涌火山灰、气体和火山岩。Mount Unzen has been spewing out volcanic ash, gas, and rock today.他转身不理他们，噔噔噔地爬上了山。He turned his back on them and stomped off up the hill.亚历山德拉穿着那身过时的衣裳，显得臃肿笨拙。Alexandra looked plump and awkward i...