Term 术语 Definition 定义
isomagnetic line
等磁力线
A line connecting points of equality in some MAGNETIC ELEMENT.
将一些磁力要素相等的点连接起来的线。
isometric
等量的
(adj.). Of or pertaining to equal measure.
形容词。相同度量的或与相同度量有关的。
isometric latitude
等量纬度
See LATITUDE.
一种辅助纬度,用于表示椭球在球面上的等角映射。
isometric parallel
等比线;等量纬圈
See PARALLEL.
在摄影测量学中,指像片平面与到相同透视中心具有相同垂直距离的水平面的交线。
isopleth
等值线
An ISOGRAM of equal or constant value of a given quantity, with respect to either time or space.
在时间或空间方面,某一给定的量具有相等或恒定值的曲线。
isopor
地磁等年变线
See ISOPORIC LINE.
参见isoporic line(地磁等年变线)。
isoporic line
地磁等年变线
A line connecting points of equal annual rate of change of a MAGNETIC ELEMENT. Also called isopor.
磁力要素周年变化率相等点的连线,亦称isopor(地磁等年变线)。
isopycnic
等密度的
(adj.). Of or pertaining to equal density.
(形容词)。密度相等的或与相等密度有关的。
isopycnic
等密度线
(n.). See ISOPYCNIC LINE.
(名词)。参见isopycnic line(地磁等年变线)。
isopycnic line
等密度线
A line connecting points of equal density. Also called isopycnic.
密度相等点的连线,亦称isopycnic(等密度线)。
isoradial
等角点辐射线
A RADIAL from the ISOCENTRE.
由等角点发出的辐射线。
isostasy
均衡,地壳均衡
A condition of approximate EQUILIBRIUM in the outer part of the EARTH, such that the gravita­tio­nal effect of masses extending above the su... more
A condition of approximate EQUILIBRIUM in the outer part of the EARTH, such that the gravita­tio­nal effect of masses extending above the surface of the GEOID in continental areas is approximately coun­terbalanced by a deficiency of density in the material beneath those masses while the effect of deficiency of density in the ocean waters is counter­balanced by an excess of density in the material under the OCEANS.
地球外表层的一种近乎平衡状况。在此状态下,大陆区域大地水准面以上的质量的重力效应近似地补偿其物质材料密度的不足,而在海洋中水密度的不足的重力效应则以海洋密度的超量来补偿。
isostatic anomaly
均衡异常
The difference between an observed value of GRAVITY and a theoretical value at the point of OBSERVATION which has been corrected for ELEVATI... more
The difference between an observed value of GRAVITY and a theoretical value at the point of OBSERVATION which has been corrected for ELEVATION of the STATION above the GEOID and for the effect of TOPOGRAPHY over the whole EARTH, and for its iso­static compensation.
观测点重力观测值与理论值之差。观测点已经进行过测站到大地水准面的高程改正,以及整个地球的地形效应改正和均衡补偿改正。
isotherm
等温线
In METEOROLOGY, the line which is the locus of points which have the same value of air tempera­ture.
在气象学中,指空气温度值相同的各点连成的线。
isothermal (or isothermic)
等温的
(adj.). Of or relating to equal temperature.
(形容词)。温度相等的或与等温相关的。
isotope
同位素
Two or more nuclides having the same atomic number, hence con­stituting the same element, but differing in mass number.
具有相同原子量的两个或两个以上核素,它们构成相同的元素,但是质量不同。
isotropic (or isotropus)
各向同性的,同质的
(adj­.). Having the same physical properties in all directions.
(形容词)。在所有方向上物理性质相同的。
isthmus
地峡
A narrow strip of LAND connecting two larger bodies of LAND.
连接两块较大陆地的狭窄条状陆地。
jack-up rig
自升式钻井平台
A rig which provides a stable drilling structure in shallow waters by extending supporting legs onto the seabed. The legs are retracted when... more
A rig which provides a stable drilling structure in shallow waters by extending supporting legs onto the seabed. The legs are retracted when the rig is under tow.
一种钻井装置,它可延伸支架到海底,从而为在浅水区域钻井提供了稳定的钻井结构。当它被拖曳时其支架是收缩的。
jellyfish
水母,海蜇
Any of various free-swimming COELENTERATES having a disc- or bell-shaped body of jellylike consisten­cy. Many have long tentacles with nemat... more
Any of various free-swimming COELENTERATES having a disc- or bell-shaped body of jellylike consisten­cy. Many have long tentacles with nematocysts (stinging cells). Some are capable of producing glowing ball LUMINESCENCE. Any jellylike free-floating organism. The term 'jel­lyfish' often is applied to the ctenophores and may be applied to certain tunicates. Also called medusa.
具有盘形或钟形的胶状体身体且可自由游动的腔肠动物。大多数的水母具有很长的带刺丝(刺细胞)的触角,还有些水母能发球形的冷光。胶状自由浮动的有机物。术语“胶状”常用于栉水母,也可指某些被囊动物。也称为medusa。