The Thirty Meter Telescope's massive primary mirror has 492 segments, all perfectly aligned to form a 30-meter (98-foot) light-collecting surface.
30米望远镜的巨型主镜分割成了492块，完美地排列从而形成30米(98英尺)的集光面。
But it had buoyed to the surface just as the squall sprang up, and with 30-knot winds and four-foot swells that splashed over the stern, it was too dangerous to retrieve the sub.
但潜艇刚刚浮上水面，暴风就凶猛来袭，30节的风速和足有四英尺高的巨浪就扑到了船上。
Growing to about a foot (30 centimeters) long, blind snakes act a lot like worms, burrowing under the surface of every continent except Antarctica.
除了南极洲，在地球上的其他各大洲都可以见到盲蛇。 它们钻入土壤中，就像一条蠕虫一样，而它们的身长也只能达到一英尺（30厘米）。
Even before Neil Armstrong set foot on the moon's surface in 1969, people were planning their holidays to space.
即使在1969年尼尔·阿姆斯特朗首次踏足月球之前，人们已经在筹划太空度假之旅。
The world's first and only commercial wave power plant resembles a 500-foot- (150 meter-) long, 11 foot- (3.5 meter-) wide snake that floats, half-submerged, on the sea surface.
世界做大也是唯一商业目的的波电站看上去就像一条500英尺（150米）长，11英尺（3.5米）宽，在海面漂浮着，一半浸没在海水里的蛇。
NASA says that there's plenty of evidence that men landed on the moon. There are photos, videos and testimonials from the dozen astronauts who have set foot on the moon's surface.
NASA说，有充分证据证明人类登上了月球：照片、录像和十多位登上月球的宇航员的书面证明。
The design for the special robot foot draws the inspiration from nature where the gecko can climb rapidly up vertical surface, even across the ceiling.
自然界中，壁虎能在光滑表面行走自如，这给特种机器人的足掌设计带来了启示。
At the foot of the drainage on embankment slope, there must be a drain, the depth and thickness of which must guarantee enough draining section when the surface is frozen.
贴坡排水层的底脚处必须设置排水沟或排水体，其深度或厚度应使水面结冰后，排水沟(排水体)的下部仍有足够的排水断面。
They moved in procession down the surface of the frozen river, on foot, and dragging their canoes after them on sledges.
在冰冻的河面上他们拖着载有小船的雪橇列队向南步行。
Ursidae that have a shaggy coat and a short tail and walk with the entire lower surface of the foot touching the ground.
熊一种通常具危险的熊科哺乳动物，有浓密的毛发和短尾巴，行走时脚的较低表面触地。
Moreover, the Genetic Algorithms does not assume that the most dangerous sliding surface must pass foot of slope, which is determined by the searching course at random.
此外，遗传算法没有边坡危险滑动面一定要通过坡脚的假定，而是随机的搜索确定的。
Samples were collected from the upper surface the tread of right foot for each pair of shoe, then inoculated and counted for the colonies.
对每双鞋的右脚上表面和鞋底取样，接种并计数菌落。
The frontal riser of the first pediment surface (P1) is the most recent fault scarp or diluvial platform; at the foot of pediment P1 outcrops the fault.
第1级麓原面（P1）的前缘陡坎为最新断层崖或洪积台地，断层崖的坡脚为断裂带地表出露位置；
The inner foot portion at its engagement surface has an axial length.
内足部在其接合表面处具有轴向长度。
The front piece includes a foot portion defining an axially extending engagement surface for interference-fit engagement with the annular surface of the seal ring.
前件包括限定与密封环的环形表面干涉配合式接合的轴向延伸的接合表面的足部。
Usually the anterior surface of the hand is called the volar or palmar surface and the inferior surface of the foot is called the plantar surface or sole.
通常将手的前面称为掌面或手掌，脚的下面称为跖面或足底。
Suddenly Sharky dived a foot or so below the surface, pulling Jeff's hand and arm underwater.
突然，沙基潜入水下大约一英尺深，把杰夫的手和胳膊拖入水中。
Therefore, the support foot and part of the flange surface were adjusted in situ, which solved the problem.
通过对烟道支腿及法兰面的局部现场调整，解决了此问题。
Experiments of walking on the surface with random slope angles are implemented, and the effects of enlarging foot radius are validated.
倾角随机变化路面样机实验验证了足半径增大对提高行走器鲁棒性的效果。
It is also preferable that the ratio of the axial length of the inner foot portion at its engagement surface to the axial length of the foot portion at its engagement surface is greater than 0.5.
优选的，内足部在其接合表面处的轴向长度与足部在其接合表面处的轴向长度的比值大于0.5。
The resulting lighting level at the work surface is a consistent 80 foot candles.
工作面的照明水平相当于80英尺的蜡烛。
The heel-shaped substrate comprises a structural gel layer having a foot receiving surface and a shoe side surface.
所述呈足跟形状的基体包括结构凝胶层，该凝胶层具有脚接收表面和鞋侧表面；
It is made from a generally foot-shaped bottom layer having a length extending from a heel area to a toe area, a top surface and a bottom surface.
该鞋垫由通常为足形的底层制成，该底层具有从踵部区域延伸至脚趾区域的长度、顶表面以及底表面。
A layer of ice several miles thick coats its fractured surface, with 1,000 - foot ice cliffs piercing a pitch-black sky.
一层几英里厚的冰川覆盖着它的断裂表面，一千英尺高的冰崖划破漆黑的的夜空。
The foot portion at its engagement surface has an axial length.
足部在其接合表面处具有轴向长度。
When it choose a place to set up home, it pokes its tongue-shaped foot out of its shell and presses it against a solid surface.
当贻贝选择一个地方建造自己的家时，它就会将它的像舌头一样的脚伸出它的贝壳外，把脚紧紧按压在一个固体的表面上。
Additionally, the part on the surface of the insole body for foot arch is provided with a projection corresponding with the foot arch.
此外，在脚心所处的鞋垫主体表面的部位设有与脚心相对应的隆起部件。
Most building codes presently specify design wind pressures per square foot of vertical wall surface.
目前大多数建筑规范都规定了每平方英尺竖向墙面的设计风压。
Not many yards below the surface, the pressure on each square foot is a matter of tons.
在离地面没有多少码的地方，每一平方英尺的压力就有好几吨。
Not many yards below the surface, the pressure on each square foot is a matter of tons.
在离地面没有多少码的地方，每一平方英尺的压力就有好几吨。
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