Turtles and tortoises have hard shells which protect their bodies.

龟有坚硬的龟壳来保护它们的。

They introduced their turtle-shell pills into three animals and studied their stomachs a day later.

他们将龟壳药片给三只猪吞下，一天后研究它们的胃。

They're strong enough to crack a turtle's shell.

它们很强壮，足以把龟壳砸开。

In another game, as the turtle swims across the oceanarium, the first porpoise swoops down from above and butts his shell with his belly.

在另一场游戏中，当海龟游过水族馆时，第一只海豚从上方猛扑下去，用腹部撞击龟壳。

I do not clam up. - You do. You clam.

我才不会缩进龟壳 -你会的 真的会。

The development of the bottom half of the shell, the plastron, is driven by neural crest cells, which can produce a variety of different cell types including neurons, cartilage and bone.

下半部分的龟壳是胸甲，它由神嵴细胞导形成，神嵴细胞可以发育出种细胞，像神元、软骨和骨细胞。

They encroach on their habitats and kill them for their meat and for their shells to make jewelry, illegal worldwide, but still freely available.

人类侵占海龟的栖息地，将海龟猎杀吃肉，将龟壳制称珠宝。这些行为在全球范围内均属违法，但仍然大量存在。

The most common method to determine a turtle's age is based on observing the lines that form on their shells.

判断乌龟年龄最常用的方法是观察龟壳上形成的纹路。

And in my personal and work life, I've dealt with my share of sliding green shells.

在我的个人生活和工作中，我越过了很的绿色龟壳（障碍）。

The focus and obsession is about beating the game, not how dumb you might look if you get hit by a sliding green shell.

专注于打游戏通关，而不是如果你被一个的绿色龟壳击中，你会显得么愚蠢。

The device they invented is the size of a large pill, encased in gelatine and shaped like the shell of a tortoise.

他们发明的装置有一个大药片的大小，包裹在明胶里，形状像龟壳。

A turtle's shell has obvious advantages for guarding against predators, but the rigid casing also presents some challenges.

龟壳具有明显的防掠食者的优势，但坚固的外壳也带来了一些挑战。

Sea turtles have flatter, lighter shells for streamlined gliding through the water.

更扁更轻的龟壳方便海龟在水中行。

The engineers loaded these polymer-encased mRNA molecules into their turtle-shell pills, which were then swallowed by six mice.

工程师们将这些聚合物包裹的mRNA分子装入龟壳状药片中，并让六只老鼠吞下。

So how did the shell evolve?

那么龟壳如何演变的呢？

Now there's black spots all over this white turtle shell.

现在这个白色龟壳上到处都是黑点。

You see, inside a turtle shell is a very particular respiratory system.

你看，乌龟壳内有一个非常特别的呼吸系统。

Yeah, he looks like one of those turtle shells from Mario Kart.

yeah, 他看起来像《马里奥赛车》里的那种乌龟壳。

Scooping out the animal, he turned the hollow shell into a singer.

他掏空了龟壳，将其改造成了一件乐器。

The cigarettes were in a cheap Chinese or Japanese case of imitation tortoiseshell.

香烟装在一个廉价的中国或日本仿龟壳盒中。