您要查找的是不是：
- They consist of concentric shells of graphite,with each shell rolled into a cylinder so the lattice of carbon atoms remains continuous. 它们由石墨的同心外壳组成，每个壳圈成圆柱，所以碳原子的晶格仍是连续的。
- They consist of concentric shells of graphite, with each shell rolled into a cylinder so the lattice of carbon atoms remains continuous. 它们由石墨的同心外壳组成，每个壳圈成圆柱，所以碳原子的晶格仍是连续的。
- These concentric shells make a layered, onion-skin structure around the dying star. 这些同心的壳形成一个个层，就像是洋葱皮的结构包围着这颗衰老的恒星。
- Caption:: Cataloged as NGC6543, a dying Sun-like star ejected its outer gaseous layers into concentric shells as a planetary nebula. 编号为NGC6543的行星状星云，由类似太阳但接近死亡的恒星向外抛出的数个同心外层气壳所成。
- This nebula's dying central star may have produced the simple, outer pattern of dusty concentric shells by shrugging off outer layers in a series of regular convulsions. 这个星云内，即将死亡的中央星可能通过一系列的爆发，不断地抛掷出外层物质后，形成了星云外同心尘埃壳。
- In this model, each electron energy level is denoted by numbers that take concentric shells as suggested by the Bohr model because there are overlaps in the ordering of the energy levels. 在这个模型里，单个电子能量水平通过获得的同圆心外壳的数量来表示，如波尔模型提出的那样，因为在能量水平面排列存在重叠。
- Keep down of you'll be hit by shell fragments. 别起来，否则你会被弹片击中的。
- The snail retreated into its shell. 蜗牛缩进壳里去了。
- A shell splinter embedded itself in the wall above his head. 在他头上方的墙壁上嵌有一块小小的贝壳片。
- The building was burned to a shell. 大楼被烧得只剩下空骨架。
- The despair left him a mere shell of a man. 他陷入绝望，形同躯壳。
- She crumbled an empty snail shell in her fingers. 她用手指捏碎了一个空蜗牛壳。
- A snail's shell is spiral in form. 蜗牛壳是螺旋形的。
- Keep down or you'll be hit by shell fragments. 别起来，否则你会被弹片击中的。
- The building was destroyed by an artillery shell. 这座建筑物被炮弹炸毁了。
- Having a shell consisting of two hinged valves. 双瓣壳的有由两个开合的瓣组成贝壳的
- I shall be expected to shell out (the money) for the party. 这次聚会可能要让我花钱。
- A clear plastic bubble or shell covering part of an aircraft. 镶有玻璃的座舱飞机上由透明的玻璃构成的透明圆罩或壳状物
- The centres of concentric circles coincide. 同心圆的圆心是一个。
- Keywords iron concentrate shell;iron ore-coal pellet;prereduction; 矿壳;矿煤球团;预还原;
