The diameter of the objective of a telescope.

孔径望远镜物镜的直径

属类：综合句库--

The diameter of such an opening,often expressed as an f-number.

孔径这种开口的直径,常以f数表示

属类：综合句库--

Test method for the average diameter of fibers constituting mineral wool and its products

矿物棉及其制品纤维平均直径试验方法

属类：行业标准名称-国家标准名-GB/T5480.4-1985

The teacher explained that the diameter and the circumference of a circle correlate.

老师解释直径与圆周有相互关系。

属类：综合句库--

Measure the diameter of this circle.

量一下这圆的直径。

属类：综合句库--

In addition, a high-integrity connection known also as a Diameter Index Safety System (DISS)connection has also been assigned to nitrogen.

另外,指定了一种被称为直径指数安全系统(DISS)的高完整性接头用于氮的使用。

属类：产品说明书-产品安全-

In addition, a high-integrity connection also known as a Diameter Index Safety System(DISS)connection has been assigned to oxygen service; medical post-type valves are assigned a yoke connection.

另外,指定了一种被称为直径指数安全系统(DISS)的高完整性接头用于氧设施;医用柱状阀门被指定使用卡箍接头。

属类：产品说明书-产品安全-

The front rollers rotate about ten times faster than the back set of rollers. This pulls the fibers out, reduces the diameter to the strand, and further parallelizes the fibers.

罗拉的转速为上一对罗拉的10倍,这样就对条子产生了牵伸作用,从而降低其直径,并进一步使纤维平行排列。

属类：行业术语-纺织服装-

A tube with a very small internal diameter .

毛细管一根内径十分细小的管子

属类：综合句库--

Each wires is five millimeters diameter which is comprised of sixty-one strands. Each strand contains four-hundred and thirty-four wires

每根单线直径5毫米,并被分成61股,每股又含有434根细线。

属类：综合句库--

The turns per meter (TPM)needed to form the best possible yarns varies with the yarn diameter .

每米的捻回数应随纱线的直径而变化,以便使纱线具有最佳的性能。

属类：行业术语-纺织服装-

The ninth and usually farthest planet from the sun,having a sidereal period of revolution about the sun of248.4years,4.5billion kilometers or2.8billion miles distant at perihelion and7.4billion kilometers or4.6billion miles at aphelion,and a diameter less than half that of Earth.

冥王星距离太阳第九远而且通常也是最远的一颗行星,它绕太阳运转的恒星年为2484年,在近日点时距太阳45亿公里或28亿英里,在远日点时距太阳74亿公里或46亿英里,其直径不到地球直径的一半

属类：综合句库--

Nanotechnology, a field whose name comes from nanometer--a unit of measure one-billionth of a meter, or a mere 10 times the diameter of a single hydrogen atom

纳米技术的名字来源于微小的度量单位纳米--相当于1米的十亿分之一,或者仅仅是氢原子的10倍。

属类：综合句库--

General purpose screw threads--Tolerances and fits for diameter from 1 to 355mm

普通螺纹公差与配合(直径1~355mm)

属类：行业标准名称-国家标准名-GB/T197-1981

General purpose screw threads--Basic dimensions for diameter from 1 to 600mm

普通螺纹基本尺寸(直径1~600mm)

属类：行业标准名称-国家标准名-GB/T196-1981

Front Discs: Ventilated 300 mm diameter

前碟煞直径300mm,通风碟煞

属类：产品说明书-车辆-

The fibre diameter increases with increasing fluidity of the molten oxide

熔融氧化物的流化度增大,纤维直径增大。

属类：综合句库--

If the diameter of the pupil is 6 mm the eye is able to separate 120 seconds of arc

如果瞳孔直径为6毫米,人眼可分辨120弧秒。

属类：综合句库--

The total diameter of cavitation, if present, is less than 4cm

若出现空洞,其直径总和小于4厘米。

属类：综合句库--

If the cable is to remain flexible there exists an upper limit to its overall diameter and hence to conductor size.

若要使电缆能弯曲,其总直径就有一个上限,从而电缆芯导线直径也有一个上限。

属类：工程技术-电力英语-

Yarns can vary in diameter and type to produce interesting fabrics.

纱线的直径以及纱线的类型可以变化,以生产出新颖的织物。

属类：行业术语-纺织服装-

Radio astronomers are now able to synthesize the response of a partially filled aperture of large diameter and thus to map variations in nebular brightness

射电天文学家现在已经能够把部分充满的大直径孔径进行综合,从而描绘出星云亮度变化图。

属类：综合句库--

The relaxation of the jet to its final diameter has been used to provide a direct estimate of the fluid relaxation time

射流到其最终直径的松弛过程,被用来对流体的松弛时间提供直接的估算。

属类：综合句库--

Guideline for pipe diameter selection in process units for petrochemical enterprises

石油化工企业工艺装置管径选择导则

属类：行业标准名称-技术规范-工程建设

In fact, the core can be further divided into two spherical layers, the solid inner core of one thousand eighty kilometer in diameter and the liquid outercore of five thousand one hundred and sixty kilometers in thickness.

实际上地球的核还可进一步划分出两个圈层,一个是固态的内核,直径为1780公里。另一个圈层是液状的外核,其厚度为5160公里。

属类：工程技术-地质-地质与勘探

Smith (1962)considered three alternate methods to determine an equivalent diameter of graded sediment

史密斯(1962)提出了三种不同方法以计算不均匀沙的当量直径。

属类：综合句库--

The card sliver is not completely uniform in diameter , and the fibers are somewhat random in arrangement.

梳棉棉条的直径并不是完全均匀的。其内部纤维的排列相对混乱。

属类：行业术语-纺织服装-

A rock fragment between4 and64 millimeters(0.16 and2.51 inches)in diameter , especially one that has been naturally rounded.

水晶石石英断片,直径4到64毫米(0。16到2。51英寸),尤指天然圆形的石英颗粒

属类：综合句库--

Standard method for measurement of volume,rim diameter allowance,height allowance,weight allowance and size of defects of domestic ceramic ware

日用陶瓷器的容积、口径误差、高度误差、重量误差、缺陷尺寸的测定方法

属类：行业标准名称-国家标准名-GB/T3301-1982