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sky-wave correction | 天波校正 | The CORRECTION to be applied to the time difference reading of received SKY WAVES to convert it to an equivalent GROUND WAVE reading. | 加在天波接收时间差上的校正。即把天波接收信号读数转变为等值的地波读数的校正。 |
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slack tide | 平潮 | See SLACK WATER. | 潮流速度非常弱或等于零时的间隙；一般指落潮流和涨潮流之间的逆转期。 |
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slack water | 憩流，滞水 | The interval when the SPEED of the TIDAL CURRENT is very weak or zero; usually refers to the period of reversal between EBB and FLOOD curren... more | 潮流速度非常弱或等于零时的间隙；一般指落潮流和涨潮流之间的逆转期。亦称slack tide。 |
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slant distance | 斜距 | The straight-line distance from one point to another, as contrasted with GROUND DISTANCE. This expression is customarily used only when the ... more | 与地面距离不同，指空间自一点到另一点的直线距离。本术语习惯上只用于地球表面上方连接两点的直线。亦称slant range。 |
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slant range | 斜距 | See SLANT DISTANCE. | 与地面距离不同，指空间自一点到另一点的直线距离。本术语习惯上只用于地球表面上方连接两点的直线。 |
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slave | 副台 | A SLAVE STATION. | 在无线电导航系统中，从主台接收的信号所控制或触发的发射台。 |
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slave station | 副台 | In a radio navigation system, the transmitting station controlled or triggered by the SIGNAL received from the MASTER STATION. Often shorten... more | 在无线电导航系统中，从主台接收的信号所控制或触发的发射台。 |
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slide: dark | 遮光板
| A thin PLATE (usually metal or fibre, rigid or flexible) which, after insertion in a camera magazine, renders it light-tight. | 安放在摄影机暗盒中，使之避光的薄板（通常是金属或纤维制成，刚性或柔性）。 |
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slide (or sliding) rule | 计算尺，滑尺 | A device used for performing rapid computations involving multiplication, division, proportion, roots, and powers. It has a body like a rul... more | 用于进行乘、除、比例、开方、乘方速算的装置。它具有象尺子一样的主体，并附带着滑动部分。主体和滑动部分按照对数比例刻有数值。 |
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slime | 粘泥，粘质物 | Soft, fine, oozy MUD or other substance of similar consistency. | 软细淤泥或相似粘度的其它物质。 |
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slip | 港池，两码头间的水区，船台 | See DOCK. | 两突堤间的空间，亦称slip。 |
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slipway | 滑船台 | The prepared and usually reinforced inclined surface on which keel- and bilge-blocks are laid for supporting a vessel under construction. | 特制和装修的斜面，在上面可安放艇架和艇座，以便支撑船体。 |
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slope | 倾斜，斜坡；斜度 | The deepening SEAFLOOR out from the SHELF EDGE to the upper limit of the CONTINENTAL RISE, or the point where there is a general decrease in... more | 指倾斜的表面或线条。相对于水平的倾斜程度，一般以比率表达。 |
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slope and height factor | 斜高比 | In the measurement of distances with Tellurometer, a factor to be reckoned when reducing distances to the SPHEROID. It takes into account t... more | 在微波测距仪量测距离中，将距离化算到椭球体上时需要计算的系数。该系数顾及了测站（主、副单位）平均高度和测边的斜度。 |
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slope angle | 斜角 | The angle between a SLOPE and the horizontal. | 斜面与水平面的夹角。 |
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slope correction (tape) | NULL | See TAPE: GRADE CORRECTION. | NULL |
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slotted-template triangulation | 切缝模片辐射三角测量 | In PHOTOGRAMMETRY, a graphical RADIAL TRIANGULATION using slotted TEMPLATES. | 在摄影测量中，使用切缝模片进行图解辐射三角测量。 |
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slough | 泥坑，泥沼， 沼泽地 | A minor marshland or tidal WATERWAY which usually connects other tidal areas; often more or less equivalent to a BAYOU. Quagmire, SWAMP, mir... more | 小块沼地或经常连接其它有潮区域的潮汐水道；多少相当于长沼。湿沼泽地，沼泽地，泥泞处。 |
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sludge | 软冰 | Spongy whitish ice lumps, a few centimetres across; they consist of SLUSH, of snow slush and sometimes of spongy ice lumps formed on the BO... more | 软性稍白的冰块，一般几厘米大小，由泥冰或雪冰泥组成。有时雪冰块在海底形成并露出水面。 |
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sluice | 闸门，水闸 | Sliding gate or other contrivance for changing the level of a body of water by controlling FLOW into or out of it. | 通过调整滑动的门板或其它装置，控制水流进出，用以改变水体水位。 |