BPA is short for bisphenol A, and it’s one of the most common ingredients in a type of hard, clear plastic called polycarbonate.

BPA 是双酚 A 的缩写，它是一种称为聚碳酸酯的硬透明塑料中最常见的成分之一。

It helps to know also that the water table can be further altered by impermeable layers in the soil, such as rocks or dense layers of clay called " hardpans" .

这还帮助我们解土壤中的不透水层，例如岩石或被称为“硬地层”的致密层，也能进一步改变地下水位。

Oaxaca cheese, more commonly known as quesillo, is a white, semihard, stretchy cheese.

瓦哈卡奶酪，俗称“克西洛”，是一种白色、半硬、有弹性的奶酪。

Shadow puppets are made of hard leather.

皮影由硬皮革制成。

Some projects create " living shorelines" made from natural elements rather than hard materials.

一些项目由自然元素而非硬材料制成的“活海岸线”。

Looking at a cross-section of a bone, there's a hard-external layer known as the cortical bone and a softer internal layer of spongy bone or trabecular bone that is composed of trabeculae.

来看一根骨头的横截面，这个硬的层叫皮骨，而软一些的松骨内层，由骨小梁构成。

Oh, that's insulation. Because the tank is often either outside or just under the roof, rigid foam is used as an insulation layer.

噢，那是保温层。因为水箱通常或屋顶下方，所以使用硬泡沫作为保温层。

The limestone that elsewhere gives Iowa its hard mineralized water was obliterated and replaced by the shocked basement rocks that so puzzled the water driller in 1912.

今天，灰岩为艾奥瓦州的其他地方提供硬矿泉水；而这里的灰岩却被砸得一干二净，由受到猛烈震动的基底岩石取而代之。正是这种岩石，1912年令那位钻井工人感到迷惑不解。

Kelley Elliott, of the Corning Museum of Glass says that when it finally appeared on the market in 1915, Pyrex dishware became an instant hit.

康宁玻璃博物馆的凯利·艾略特说，当硬玻璃厨具于1915年最终面市时，很快就成为抢手货。

The boom in trade of the rich-hued hardwood has already claimed 15 lives in 2011, and dozens more have been wounded by Thai soldiers.

2011年已有15人死于这种红色硬木材交易，数以十计的人被泰国士兵射伤。

And what about durum wheat, which grows abundantly in Mediterranean lands and is used to make pasta, flatbreads and couscous?

那么盛产于地中海地区，被用来制作意大利面、扁面包和粗麦粉的硬小麦呢？

Many of the sharks, do get bony cartilage vertebrae which do in fact fossilize which is contrary to common belief.

很多鲨鱼的确会有能够形成化石的骨化的硬脊椎，这跟一般人所认为的相反。

Nature often smoothly, glides, swims or wiggles, without the rattling of rigid parts or the loud rubbing of surfaces.

自然界的生物通常流畅地滑动、游动、摆动，没有硬部件的响声，也没有表面之间的摩擦噪音。

The two small stiff membranes you see under the first abdominal segment are like the skin of a drum.

你能看到这第一腹节下面的这两个硬膜就如同鼓的蒙皮一样。

Only plant cells have a cell wall, which is made of rigid cellulose that gives the plant structure.

但只有植物细胞有细胞壁，它是由硬纤维素组成，能形成植物的支撑架构。

Formica is a type of hard plastic used for covering tables and working areas in kitchens.

胶木是一种用来覆盖桌面以及厨房工作区域的硬塑料。

Edam is a semihard cheese traditionally sold in spheres.

Edam是一种半硬奶酪，传统上以球形出售。

Modelling suggests that durum yields will sharply fall there if the temperature keeps on rising.

气候模型显示，如果气温持续上升，那里的硬小麦产量将大幅下降。

Formica is a type of hard plastic used for covering tables and working areas in kitchens-but it's not the oldest type.

Formica是一种用来覆盖桌子和厨房里的工作区的硬塑料——但它并不是最古老的类型。

For the candidates, these two components are mounted on the elytra — the two most rigid wings on the insect.

对于演奏者这两部分都它们的鞘翅上面——鞘翅是昆虫的两个硬的翅膀。