1.
having a hard shell or shell-like covering.
有硬壳或壳状遮盖物。
2.
A material encrusted on a surface.
硬壳表面表面的硬壳状物
3.
The hard, siliceous bivalve shell of a diatom.
硅藻细胞壳硅藻的坚硬含硅的硬壳
4.
The turtle is protected by its hard shell.
龟受到它的硬壳的保护。
5.
having a hardened crust as a covering.
有硬壳作为覆盖物的。
6.
The shell enclosing the meat of a nut.
坚果外壳包围果果肉的硬壳
7.
Hard eggs, squishy eggs, leathery eggs,
硬壳卵、扁卵、皮革般外壳的卵、
8.
ticks having a hard shield on the back and mouth parts that project from the head.
背部有硬壳的扁虱，其硬嘴从头部伸出。
9.
form a crust or a hard layer.
形成一个硬壳或坚硬的层。
10.
edible crab that has not recently molted and so has a hard shell.
可食用蟹，换壳后时间长因而有一个硬壳。
11.
Crust over
使在表面上形成一层硬壳：
12.
become encrusted with crystals due to evaporation.
因为蒸发作用而结晶成硬壳。
13.
A crust appears to have formed over the volcanic rubble.
火山熔岩表面似乎形成了一层硬壳。
14.
The hard shell of a nut protects the seed inside it.
坚果的硬壳保护里面的种子。
15.
To become covered with a crust.
有外壳，有硬皮变得覆有外壳，硬皮
16.
Having a thick, heavy, or hardened shell.
具有厚重或坚硬的壳的
17.
This kind of beetles have hard shell.
这类甲虫有坚硬的外壳。
18.
being or having or resembling a hard crust or shell.
属于、有或象硬皮或外壳。