The birch tree has white bark, and this tough protective outer layer of the tree, this white bark, is waterproof.
桦树有白色的树皮，树上这个坚硬的保护外层，这个白色的树皮，是防水的。
Today such gravitational compensation probably would not occur: the outer layer of the Moon is too cold and stiff.
今天这种引力补偿很有可能不会发生：月球的外层过于寒冷和坚硬。
Often, you will only need this in the coldest weather, when the fleece adds extra insulation between your base layer and your outer layer.
通常你只会在最冷的天气才需要这个，羊毛会在你的底层和外套之间增加一个额外的隔绝层。
Glass can be used as the outer layer.
外层可以使用玻璃。
Top this with a waterproof, breathable outer layer.
在这一层之上，是防水透气的外层。
As we age, the outer layer of tooth enamel wears away.
随着年龄增长，我们牙齿外层的釉质会慢慢地磨损。
How many electrons has a magnesium atom in its outer layer?
镁原子的最外层有多少电子？
The cortex is the outer layer and the outer layer is all crumpled up.
大脑皮层是大脑的外层，上面布满了褶皱。
Wear an outer layer of breathable, wind-resistant, water-resistant material.
穿一件抗风防水材料制成的透气的外套。
The outer layer of the cerebrum is called the cortex (also known as "gray matter").
大脑外层叫做皮质(也称“灰质”)。
The outer layer is a secluded garden that wraps the southern corner of the building.
建筑外层是一个隐蔽的花园，环绕着建筑南部的角落。
First, our lips don't have the same protective outer layer as the skin elsewhere on our bodies.
第一，我们身体其他部位的肌肤有一层“保护层”，这是嘴唇所没有的。
The brightness of the photosphere prevents people from seeing the outer layer of the sun's atmosphere.
光球层的亮度阻止了人们看到太阳大气层的外层。
The outer layer of skin is made up of fibers woven in a three-dimensional pattern that acts like a sponge.
皮肤表层是由纤维以三维模式交织构成，起到了海绵一样的作用。
It sends chemical signals to the cerebral cortex, the outer layer of the brain, related to reasoning and memory.
它向脑部最外层的大脑皮层发送化学信号，从而影响推理和记忆功能。
there are many genes that are already expressed and presented in this dimpling and thickening of the outer layer.
在外胚层的凹陷和增厚过程中,表达了很多基因。
The inner layer of the antenna contains nanotubes with a small bandgap, and nanotubes in the outer layer have a higher bandgap.
天线内层是窄带隙的纳米管，与此相反，外层的纳米管则具有较宽的带隙。
The water temperature should be cool or warm for a 15 to 20 minute soak so that the skin's outer layer can absorb moisture.
无论水温是凉爽还是暖和，每次至少要泡15到20分钟，皮肤的外层才能吸收水分。
Such a beam would easily penetrate the star's outer layer, but the stellar core would be sufficiently dense to absorb part of it.
这种光束很容易穿透恒星的外层，但是恒星的内核的密度将足以吸收其中的一部分。
It's very important to wear a windbreaker as your outer layer, since wind is often the biggest contributor to winter coldness.
抗风非常重要，我们感觉冬天很冷的主要是因为风在起作用。
The human body regrows its outer layer of skin every two to four weeks, and bits and pieces of the old skin break off - to become dust.
人体皮肤外层每2至4周更新一次。老化的皮肤将会脱落，成为灰尘的一部分。
In the outer layer (ectoderm) the neural tube is forming from which the baby's nervous system-brain spinal cord skin and hair-will develop.
在外胚层，神经管正在形成，在此基础上，婴儿的神经系统——大脑、脊髓、皮肤和毛发——将会形成。
When bombarded with ultraviolet rays from the sun, the lettuce leaf creates UV-absorbing polyphenolic compounds in its outer layer of cells.
当来自太阳的紫外线轰击到莴笋时，莴笋叶子就会在外层细胞创造吸收紫外线的多酚类物质。
Each tentacle has about 5, 000 stinging cells, which are triggered not by touch but by the presence of a chemical on the outer layer of its prey.
每条触手大约有5000个刺细胞，这些细胞的触发不是由于触摸，而是由于猎物的外层化学物质。
In the outer layer (ectoderm) the neural tube is forming, from which the baby's nervous system-brain, spinal cord, skin and hair-will develop.
在外胚层，神经管正在形成，在此基础上，婴儿的神经系统——大脑、脊髓、皮肤和毛发——将会形成。
In this case, that means the excitons in the outer layer flow to the inner layer, where they can exist in a lower (but still excited) energy state.
因此，这就意味着激子从纳米管外层流向内层，并以较低(但仍为激发态)的能态存在于纳米管中。
The acidic pH interacts with the hair's slightly negative charge to help the cuticle, the outer layer of the hair, maintain a smooth, flat surface.
酸性PH值和头发上的微量的负电荷相互作用，以此来帮助毛小皮，即头发表面的一层，保持表面光滑平整。
New buildings in many countries are nowdays thermally insulated by having an outer layer of insulating material like expanded polystyrene(EPS).
在许多国家，新修建筑通过外墙使用保温材料如发泡聚苯乙烯（EPS）板来获得保温效果。
The kind of authorization provided by a Web server like Apache might be called coarse-grained access control because it provides only an outer layer of security.
诸如apache等Web服务器提供的授权类型可以称为粗粒度访问控制，因为它只提供了一个外部安全层。
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