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	Term	术语	Definition	定义
	hinterland	内地，腹地	The district behind that lying along the COAST; the back country.	落后于沿海地区的地区；边远地区。
	historic bay	历史海湾	Historic bays are those over which the coastal state has publicly claimed and exercised jurisdiction and this jurisdiction has been accepte... more Historic bays are those over which the coastal state has publicly claimed and exercised jurisdiction and this jurisdiction has been accepted by other states. Historic bays need not match the definition of "bay" contained in the United Nations Convention on the Law of the Sea.	历史海湾是那些沿岸国已公开宣称拥有和行使管辖权，并且该管辖权已被其它国家认可的海域。历史的海湾不必和联合国海洋法公约中的“海湾”定义相一致。
	hoarfrost	霜、白霜	Deposit of ICE, having a crystalline appearance, generally assuming the form of scales, needles, feathers or fans. Hoarfrost is produced in... more Deposit of ICE, having a crystalline appearance, generally assuming the form of scales, needles, feathers or fans. Hoarfrost is produced in a manner similar to DEW but at a temperature below 0°C. Also written as two words.	微小的冰粒，具有结晶的外部特征，通常呈现鳞状、针状、羽毛状或扇状。这种水汽凝结现象产生的方式与露相类似，但温度要在0℃以下。也可以写成两个单词（hoar frost）。
	hodograph	速度图	Used in oceanography. The tidal current vector hodograph is the figure traced out by the tip of a vector representing the current over the t... more Used in oceanography. The tidal current vector hodograph is the figure traced out by the tip of a vector representing the current over the tidal cycle.	用于海洋学。潮流矢量速度图使用向量箭头表示潮汐周期内的潮流。
	hodometer	里程计，计程计	See ODOMETER.	参见odometer（里程计）。
	holding ground	锚地底质	An expression usually used with a modifying adjective to indicate the quality of the holding power of the material constituting the BOTTOM... more An expression usually used with a modifying adjective to indicate the quality of the holding power of the material constituting the BOTTOM of an ANCHORAGE; e.g., of good (or poor) holding ground.	此词常与修饰性形容词连用，表明构成锚地底部的物质的锚抓力性质；例如，锚地底质良好（欠佳）。
	hole	海穴；洞穴	An abrupt HOLLOW in the GROUND or ocean floor. See also PASSAGE.	地面或洋底陡深的空洞。亦可参见passage（航道，通道）。
	holiday	漏测区	An unintentional unsurveyed area within a given hydrographic survey where the spacing between sounding lines or surveys exceeds the maximum ... more An unintentional unsurveyed area within a given hydrographic survey where the spacing between sounding lines or surveys exceeds the maximum allowable limits.	在某一海道测量中，测深线或测深点之间间距超过最大允许范围的无意识未测区域。
	hollow	波谷，洞穴	TROUGH or depression between CRESTS of sea-waves. A cavity or HOLE.	波浪的两个波峰之间的低谷或凹部。洞或洞穴。
	homing	归航，回航，定向航行；活动台向固定台移动	NAVIGATION toward a point by maintaining constant some navigational COORDINATE(S), usually BEARING. The procedure of using the direction-... more NAVIGATION toward a point by maintaining constant some navigational COORDINATE(S), usually BEARING. The procedure of using the direction-finding equipment of one RADIO STATION with the emission of another RADIO STATION, where at least one of the STATIONS is mobile, and whereby the MOBILE STATION proceeds continuously towards the other STATION.	保持固定的航行坐标而向某个地点航行，通常是保持航向不变。使用无线电台测向设备接收另一无线电台发射信号测定方位的作业。此时至少有一台是移动台，此移动台连续不断的向另一个无线电台连续移动。
	hook	弯曲部分，河湾	A sharp bend or angle in the course or length of anything; especially a bend in a RIVER. A projecting corner, POINT or SPIT of LAND.	任何物体在长度方向上的突然弯曲或者弯角；尤其指河流的弯曲。陆地的凸出角、岬或沙咀。
	horizon	地平线，视界	In general, the apparent or visible junction of the EARTH and sky, as seen from any specific position.	概括说，从某一特定位置看去，地球和天空明显可见的交界处。
	horizon: apparent	地平线，视地平	The irregular line along which rays from the point of observation are tangent to the surface of the EARTH. Also called visible (or local) ho... more The irregular line along which rays from the point of observation are tangent to the surface of the EARTH. Also called visible (or local) horizon.	由观测点发出的与地球表面相切的视线所构成的地平线。也称作可见地平（visible horizon）。
	horizon: artificial	人工地平仪	A device for indicating the HORIZONTAL, as a bubble, GYROSCOPE, PENDULUM, or the flat reflecting surface of a liquid.	用于指示水平的装置。如气泡、陀螺仪、摆仪、或液面反射表面。
	horizon: celestial	地心真地平，天球地平圈	That circle of the CELESTIAL SPHERE, formed by the intersection of the CELESTIAL SPHERE and a plane through the centre of the EARTH, and pe... more That circle of the CELESTIAL SPHERE, formed by the intersection of the CELESTIAL SPHERE and a plane through the centre of the EARTH, and perpendicular to the zenith-nadir line. Also called rational horizon.	天球上的圈，由天球和过地球中心并且垂直于天顶／天底线的一个平面相截而形成。也称作天球地平圈。
	horizon: closing the	NULL	Measuring the last of a series of horizontal angles at a STATION required to make the series complete around the HORIZON. See also ERROR OF ... more Measuring the last of a series of horizontal angles at a STATION required to make the series complete around the HORIZON. See also ERROR OF CLOSURE OF HORIZON.	NULL
	horizon: dip of the	NULL	See DIP.	NULL
	horizon: false	假地平	A line resembling the APPARENT HORIZON but above or below it.	类似于视地平线的直线，但是位于视地平上面或者下面。
	horizon: radio	无线电地平线	See RADIO.	自发射天线发出的直接射线与地球表面相切的直线。这条线的距离比视距地平线要远，且随频率减小而增加。
	horizon: rational	天球地平圈	See HORIZON: CELESTIAL.	参见celestial horizon(天球地平圈)。
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