A plastron is the underside of a tortoise or turtle's shell.

海龟底部有龟甲。

Then, if sufficiently hot, their underside would melt to produce buoyant granite, leading to the first continental plateaus.

然后，如果温度足够高，它底部融化，产生漂浮花岗岩，形成第一个大陆高原。

They'll hang out like undersides of leaves.

它喜欢叶子侧。

With an f consonant sound, as in 'fork', and 'from' and 'fry' the lower lip touches the underside of the upper front teeth but loosely, so there's a little bit of space through which the breath travels.

以 f 辅音发音，如“fork”，“from”和“fry”，下唇接触上门牙下侧，但很松，所以有一点空间让呼吸通过。

Within moments they had located a hole two meters in width on the steamer's underside.

一儿，他知道船底有一个长两米大洞。

His back and shoulders were grayish brown, while his undersides were lighter.

它后背和肩膀是浅灰棕色，下颜色更浅。

The bow is located on the underside of the opposite elytron.

弓另一个鞘翅之下。

And we'll find those funky little stomata on the underside of the leaf.

我叶子背找到那些时髦小气孔。

Look at this, that's a wheel, this is the underside of a plane, this is what's left of the wing.

看这个，这是个轮子，这是飞机底部，这是机翼残余部分。

“We find that the melting of the underside of the ice shelves is even larger than the production of icebergs, " Rignot said. " So it is the dominant process of ice removal in the Antarctic.”

“我发现，冰架下冰雪融化规模甚至比生成冰川要多，因此这是南极冰雪转移主要过程。”

And the map that we follow of the cranial nerves is based on a ventral view of the brain — looking at its underside, with the anterior portion at the top, and posterior on the bottom.

我跟踪脑神经图是基于大脑腹侧视图——看看它下，前部分顶部，后部分底部。

" We find that the melting of the underside of the ice shelves is even larger than the production of icebergs. So it is the dominant process of mass removal in the Antarctic."

“我发现，冰架下冰雪融化量甚至比冰山生成速度还要快，因此这是南极洲大规模转移主要过程。”

In a thoracentesis, a hollow needle to drain the fluid is carefully inserted over the top of a rib, to avoid injuring the neurovascular bundle running along the underside of each rib.

胸穿就是将一个空心针小心地沿肋骨上缘插入，这样是为了避免损伤沿每个肋骨下缘走行神经血管丛。

That enables countershading, where the underside of the squid is lighter than the top, to eliminate a silhouette that a predator might spy from below.

这就实现了反荫蔽，使得乌贼底比顶部浅，消除了捕食者可能从下看到轮廓。

She dove off the overpass just ahead of the explosion, shooting a grappling hook into the underside of the bridge and swinging herself upright onto the street below. She landed running.

她爆炸前及时跳下高架桥，向桥底端掷出攀爬钩，径直荡到下方街道上，落地后继续飞奔。

The wind resistance on the underside of the drop causes the bottom of the drop to flatten, resulting in a drop looking like a hamburger bun.

落点下方风阻力使落点底部变平，导致落点看起来像一个汉堡包。

The whales were trained to hold up the underside of their tails for the blood draws, which were taken once or twice a month.

这些鲸鱼被训练来支撑它尾巴下侧以供抽血，每个月抽血一到两次。

Once they are fully grown, the caterpillars will attach themselves to the underside of a leaf or branch and form a pupa, or chrysalis.

毛毛虫一旦完全长大，就附着树叶或树枝底部，然后形成蛹或者茧。

He once painted wooden birds with darker tops and lighter undersides to show how they vanished against the colors of their natural habitats.

他曾经画过顶部较暗、底部较浅木制鸟类，以展示它是如何自然栖息地颜色下消失。

Apparently she used to take a candle, burn it on the underside of a saucer and then mix that soot with Vaseline.

显然，她过去常常拿一支蜡烛，碟子底部燃烧，然后将烟灰与凡士林混合。