The fossils buried in Pleistocene and earlier ocean sediments were of foraminifera—small, single-celled marine organisms that secrete shells of calcium carbonate, or calcite.
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5. 它喝树根的汁液，并且有一层硬壳覆盖着。
It drinks juice from tree roots and it is covered in a hard shell.
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6. 阳光的温暖使它们的水晶硬壳掉落，在雪壳上粉碎和雪崩，这么一大堆碎玻璃尽够你打扫。
The sun's warmth makes them shed crystal shells—shattering and avalanching on the snow crust—such heaps of broken glass to sweep away.
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7. 柔软的龙虾肉值得费力剥开硬壳。
The tender lobster meat is worth the effort of cracking the hard shell.
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8. 木质硬壳硬到不得不用锤子才能砸出裂缝。
The hard, woody, outer peel is so hard that it has to be cracked with a hammer.
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9. 当它们成长时。它们需要更换硬壳若干次。
They need to change their hard shells a few times as they grow.
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10. 如果你要吃核桃，必须先把它们从硬壳中敲出来。
If you want to eat walnuts, you must knock them out of the hard shells.
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11. 甲虫有硬壳。
Beetles have shells.
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12. 有时，玉米圆饼会被油炸成硬壳，抑或只是加热以保持其松软。
Sometimes the tortilla is Fried to make a hard-shelled taco, or just heated up to keep it soft.
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13. 大西洋海岸产的硬壳圆蛤类；大蛤通常作杂烩用，其他蛤做菜。
Atlantic coast round clams with hard shells; large clams usually used for chowders or other clam dishes.
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14. 当地一家烘焙店还专门用硬壳将蛋糕包裹起来，以防止水果渗出。
A local bakery even covered it with a hard shell, to stop the fruit from bleeding through.
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15. 只要多休息，多吃一些水果，和硬壳的东西，对孩子很有好处的。
As long as more rest, eat some fruit, and the hard shell of things, very good for the children.
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16. 我学会了……所以，根据每个人的硬壳，是有人希望得到的赞赏和喜爱。
I've learned... that under everyone's hard shell is someone who wants to be appreciated and loved.
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17. 服装一律是有褶边的短裙，即每一个女演员所穿的用硬壳撑起来的短裙。
The rule in costume was the frilly tutu the short stiffly-projecting skirt worn by every ballerina .
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18. 甲壳虫身上的硬壳是外表保护层，蚯蚓的“皮肤”，叫角质层，也是保护层。
The hard shell on a beetle is an outside protection, as is the "skin, " called cuticle, of an earthworm.
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19. 它本身的钢皮像一个“硬壳”结构一般负载，从而降低附加的梁柱所需的成本。
The steel skin itself takes the load like a "Monocoque" structure thus cutting cost for additional columns or beams.
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20. 机身为半硬壳结构，轻质合金的环形隔框和纵向长桁支撑并加强了主要机身蒙皮。
The fuselage is a semimonocoque structure, light alloy circular frames and longitudinal stringers support and strengthen the main fuselage skin.
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21. 今年3月，通过对冰岛一带贝壳的研究发现，其硬壳氧同位素的水平会随水温的变化而产生差异。
A study this March of clamshells taken from Iceland found that the levels of oxygen isotopes in the shell layers varied depending on the temperature of the water in which they formed.
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22. 核桃坚果由硬壳和种仁组成，种仁营养丰富，深受人们喜爱，而硬壳则很少受到重视。
Walnut includes shell and kernel, the latter is popular because of abundant nutrition, but the former is not attached importance.
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23. 图中左边的样本，曾经被认为是一种具有硬壳的埃迪·卡拉藻类，其实际直径小于一毫米。
The object on the left, less than a millimetre across in reality, is an example of what were once thought to be the encysted forms of Ediacaran algae.
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24. 张衡把天比作一个鸡蛋壳，把地比作蛋壳中的鸡蛋黄，但他并不认为硬壳是宇宙的边界。
Zhang Heng, however, did not believe the eggshell to be the boundary of the cosmos.
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25. 为证明他们的假设，他们使用一个特殊的能观察到纳米尺度的显微镜分析黄蜂外骨骼的硬壳。
So they used a special microscope that's able to look at nano-sized details, and analyzed the hard layers of the hornet's exoskeleton.
