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Term | 术语 | Definition | 定义 |
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threshold | 跑道入口 | In aeronautical terminology, the beginning of that portion of the RUNWAY usable for landing. | 航空术语，指用于着陆跑道的首端。 |
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threshold speed | 临界速度 | The minimum SPEED of CURRENT at which a particular CURRENT METER will measure at its rated reliability. | 水流的最低速度，在此流速中用专用流速仪测量可达到额定精度。 |
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thunder | 雷声 | Sharp or rumbling SOUND which accompanies LIGHTNING. | 伴随着闪电的急剧或隆隆雷声。 |
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thunderstorm | 暴风雨 | One or more sudden electrical discharges manifested by the flash of light (LIGHTNING) and a sharp or rumbling sound (THUNDER). | 通过闪光（闪电）表现为一个或多个突发性放电，并伴有急剧的或隆隆雷声（雷声）。 |
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tidal basin | 潮汐港，有潮港池 | See BASIN. | 指受潮汐影响的港池，尤指能用水闸保持理想水位的港池。 |
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tidal bore | 涌潮 | See BORE. | 指潮水迅速涌入河口时所产生的高碎浪，如果河口处潮汐作用范围很大，涌潮也可能在浅河河口发生。如... more |
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tidal constants | 潮汐常数 | Tidal relations that remain essentially constant for any particular locality. Tidal constants are classed as harmonic and non-harmonic, ... more | 某特定地区保持不变的潮汐关系。潮汐常数分为调和常数和非调和常数，调和常数由振幅和迟角组成，非... more |
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tidal constituent | 调和分潮，分潮 | See HARMONIC CONSTITUENT. | 在引潮力的数学表达式，和潮汐或潮流的对应公式中的调和要素之一。每个分潮都代表地球、太阳和月亮... more |
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tidal current | 潮（汐）流 | See CURRENT. | 海水在引潮力的作用下伴随落潮所产生的交替水平运动。亦称tidal stream。 |
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tidal current chart | 潮流图 | See CHART. | 用箭头和数字表示在潮流周期的某一特定时期潮流的平均方向和速度的海图。 |
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tidal current signal | 潮流信号 | See SIGNAL. | 传递有关区域潮流信息的信号或讯息。 |
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tidal (or tide) cycle | 潮汐周期 | A complete set of tidal conditions, as those occurring during a TIDAL DAY, LUNAR MONTH or METONIC CYCLE. | 一个完整的组潮汐情况，如在潮汐日、朔望月或默冬周期期间所发生的情况。 |
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tidal datum | 潮汐基准面 | See DATUM. | 按某些潮汐相位确定的一种海平面，根据该海平面可推算出水深和潮高。 |
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tidal day | 潮汐日，太阴日 | LUNAR DAY. The period of the daily CYCLE of the TIDES, differing slightly from the LUNAR DAY because of PRIMING and LAGGING OF THE TIDE. | 太阴日。潮汐的每日周期。由于潮时提前和潮时延后，它与太阴日略有差异。 |
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tidal difference | 潮（高，时）差，潮汐改正数 | Difference in TIME or HEIGHT of a HIGH or LOW WATER at a SUBORDINATE STATION and at a REFERENCE STATION for which predictions are given in t... more | 附属站与潮汐表给出预报的标准站之间的高潮或低潮的时差或高差。根据从标准站预报得到的差值，可给... more |
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tidal epoch | 初相，迟角 | See PHASE LAG. | 实际最大分潮落后于假设的与其相应的同样最大平衡分潮的角延迟。亦称tidal epoch。 |
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tidal flat | 潮汐滩 | A MARSH or sandy or muddy coastal flatland which is covered and uncovered by the RISE and fall of the TIDE. | 由于潮汐升降而被淹没或露出的沼泽、沙滩或泥滩。 |
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tidal harbour | 有潮港，潮汐港 | See HARBOUR. | 有潮汐影响的港，区别于由沉箱或闸门保持海面水位的港。 |
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tidal light(s) | 潮汐灯 | See LIGHT. | 进港处的灯，指示港内潮汐或潮流的情况。 |
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tidal movement | 潮水流动，潮汐流；潮汐运动 | The movement which includes both the vertical RISE and fall of the TIDE, and the horizontal FLOW of the TIDAL CURRENTS. This movement is ass... more | 包括垂直的潮汐升降和水平的潮流流动的运动。该运动与作用在旋转地球上的月亮和太阳的天文引潮力有... more |