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Term | 术语 | Definition | 定义 |
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river mouth | 河口
| The exit or point of discharge of a river into the sea, a lake, or another river. | 江河流入海洋、湖泊或其他江河的出水口或泄水端。 |
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river roadstead | 江河锚地
| A ROADSTEAD which lies in a river. | 位于江河内的锚地。 |
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rivulet | 溪，小河
| A small RIVER. | 较小的河流。 |
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road(s) | 泊地
| See ROADSTEAD. | 参见roadstead（锚地）。 |
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roadstead | 锚地，泊地
| An area near the SHORE, where vessels can anchor in safety; usually a shallow INDENTATION in the COAST. Also called road or roads. See OPEN ... more | 船只能安全锚泊的近岸区域，一般为海岸的浅水凹湾。亦称road（泊地）。参见open roadstead（开敞锚地） |
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roaring forties | 咆哮西风带，南纬40°带
| An expression often used to denote that belt in the OCEANS, between 40° and 50° south LATITUDE, where strong westerly WINDS prevail. | 指南纬40°～50°之间的海洋区域，那里强烈西风盛行。 |
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Roberts radio current meter | 罗伯特电子海流仪
| An electro-mechanical CURRENT METER which measures current speed and direction. This METER can be suspended below an anchored BUOY or ship w... more | 一种可测量流速及方向的机电式海流仪。该仪表可吊装在一个锚定的浮标或船上，通过其上装载的无线电发射机将海流测量结果发送到另外一艘船上或岸基监控站。 |
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rock | 岩石，礁石
| Any formation of natural origin that constitutes an integral part of the LITHOSPHERE. The natural occurring material that forms the firm, h... more | 地球岩石圈组成部分的任何天然基石，自然存在的物质形成的海底稳固、坚硬、结构紧密的岩块。
一种孤立的岩石或单块大石头，通常对航行构成危险。参见rock awash（适淹礁），sunken rocks（暗礁），pinnacle（尖礁）和uncovers（干出礁）。 |
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rock awash | 适淹礁
| A ROCK awash at CHART DATUM. | 海水在海图基准面高度时正好被淹没的礁石。 |
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rock borer | 岩石蛀虫
| A member of any of several families of bivalves that live in cavities they bore in soft ROCK, concrete and other material. | 一种双壳贝类穿孔虫，它们在低硬度的岩石、混凝土和其他材料上穿孔，并生存在其中。 |
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rocket | 火箭；信号弹
| In hydrography or navigation, a pyrotechnic projectile used for signalling, or for life-saving purposes. | 在海道测量或航行中，一种用于打信号的或救生目的的烟火弹。 |
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rocket sounding | 火箭探测
| Determination of one or more upper-air meteorological elements by means of rocket-borne instruments. | 利用火箭装载仪器探测一种或多种高空气象要素。 |
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rocket station | 火箭站
| A LIFE SAVING STATION equipped with line-carrying rocket apparatus. | 配有火箭发射设备的海岸救生站。 |
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rock flour | 岩乳
| Finely ground rock particles, chiefly silt size, resulting from glacial ABRASION. A component of marine DEPOSITS off glacial stream mouths. | 由于冰川磨损而产生的被磨得很细的地表岩石微粒，粒度绝大部分都为砂粒级。冰川河口的一组海洋沉积物。 |
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rockweed | 岩藻 | One of a group of marine plants, principally of an order (Fucales) of the brown ALGAE, mostly multibranched and leathery, which grow attach... more | 海生植物的一种，主要是褐藻类，由一个称作夹钳的器官附着在潮间带的岩石上，亦称wrack 或者fucus。 |
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rock which covers and uncovers | 干出礁
| A ROCK of small area (PINNACLE) that COVERS AND UNCOVERS at various states of the TIDE. | 在不同潮汐状态下或露出或淹没的小面积礁石。 |
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rocky area | 岩石区 | An area with a rocky BOTTOM. | 海底有岩石礁的区域。 |
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rod | 杆，标尺
| A unit of length equal to 5.5 YARDS or 16.5 FEET. Also called PERCH or POLE. A STADIA or LEVELLING ROD. See also SOUNDING POLE. | 相当于5.5码或16.5英尺的长度单位。亦称标杆，测杆。
视距尺或水准尺。亦见sounding pole（测深杆）。 |
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rod: levelling | 水准尺
| See LEVELLING ROD. | 一种直杆或直棒，用于测量地面点和已调整至水平位置的水准仪照准线之间的垂直距离。也称为levelling staff（水准标尺）。 |
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rod: range | 视距尺，标杆
| See RANGE ROD. | 一种简易测量标杆。装有尖头金属底座，一般涂有红白相间的颜色，使用时竖立在测站上。 |