1.
A protective external shell or case, as of a rotifer or any of certain other microscopic animals.
护身硬壳轮虫或任何其它微生物体外的保护性的壳或套
2.
The turtle is protected by its hard shell.
龟受到它的硬壳的保护。
3.
A protective covering of bony plates or scales.
护身甲壳保护骨盘或介壳的覆盖层
4.
sea urchin having a heart-shaped body in a rigid spiny shell.
有心形身体的海胆，壳硬而多刺。
5.
The hard shell of a nut protects the seed inside it.
坚果的硬壳保护里面的种子。
6.
A virus is covered with a hard protective shell of protein.
病毒的外部有一个蛋白质保护性硬壳。
7.
insect larva that constructs a protective case around its body.
昆虫的幼虫，能建造身体的保护壳。
8.
a stiff hollow protective spine on a porcupine or hedgehog.
豪猪或刺猬身上硬而中空的保护刺。
9.
A tough, protective covering, such as the bony scales covering certain animals or the metallic plates on tanks or warships.
甲壳坚硬的，保护性外壳，如履盖某些动物的骨质鳞片或坦克或战舰上的金属壳
10.
The protective covering of certain animals, as the shell of a turtle.
甲壳某些动物身上有保护作用的覆盖物，例如乌龟的壳
11.
having a hard shell or shell-like covering.
有硬壳或壳状遮盖物。
12.
An old crab grew restless. Finding himself stiff all over, he knew it was time for him to moult his shell.
螃蟹觉得不安了，觉得全身太硬了，自己知道要蜕壳了。
13.
Shell Turbo T oils provice long term protection against rust and corrosion of your hardware.
壳牌多宝T涡轮机油可为你的硬件设备提供长期的防锈蚀保护。
14.
But they do not have hard, protective shells like most turtles.
但是它们不像绝大部分海龟那样拥有坚硬的保护壳，
15.
A metal structure, such as an aircraft, in which the skin absorbs all or most of the stresses to which the body is subjected.
硬壳式构造一种金属构造，如飞机，其外壳承担机身受到的全部或大部分压力
16.
According to new research, the influenza virus coats itself in a protective fatty shield that is tough enough to withstand cold temperatures.
一项最新研究发现，流感病毒表面包有一层脂肪保护外壳，这种外壳十分坚硬，能抵御严寒。
17.
A material encrusted on a surface.
硬壳表面表面的硬壳状物
18.
The hard, siliceous bivalve shell of a diatom.
硅藻细胞壳硅藻的坚硬含硅的硬壳