大约时间

Time-sequenced images have recently shown that spicules last about five minutes, starting out as tall tubes of rapidly rising gas but eventually fading as the gas peaks and falls back down to the Sun .

最近依时间序列得到的图像表明，针状物大约持续了五分钟，始于迅速上升的强大气体漩涡，最终随着气体抛射达到高峰并回落到太阳表面而衰落。

The results show that a the variation of annual mean runoff of Huayuankou section exist an intrinsic dynamic mechanism, which is the results of joint action of affecting factor of periodicity and non-periodicity, having obvious chaos characteristic; b the correlation dimension of attractor of phase space is 5.09 and saturation inserted dimension is 14. It shows that to establish a mathematical model of the annual mean runoff system of Huayuankou at least requires 6 independent variables and the required saturation inserted dimension for rebuilding phase space is 14; c the steady estimate of Kolmogorov entropy is 0.14, showing the average predictable time of the annual mean runoff variation of Huayuankou is about 7 years and; d using nonlinear deterministic chaos model is more suitable to describe the variation of annual mean runoff of Huayuankou.

结果表明：①花园口年平均径流量变化存在着内在动力学机制，是由周期性和非周期性影响因子共同作用的结果，具有明显的混沌特性；②相空间吸引子的关联维为5.09，饱和嵌入维数为14，这说明要建立花园口年平均径流系统的数学模型，至少需要6个独立变量，重构相空间所需要的饱和嵌入维数为14；③Kolmogorov熵的稳定估计为0.14，说明花园口年平均径流量变化的平均可预报时间大约为7年；④用非线性确定性的混沌模型比完全的随机模型更适于描述黄河花园口年平均径流量的变化。

Results showed that the temperature in the fluidized bed was steady under the condition of adopting the plasma body to heat the reactor,and the preheat time is 1.5 h.

结果表明采用等离子体加热，整个反应器的预热时间大约为1.5 h，且反应过程中流化床内温度稳定，有利于生物质快速热裂解反应的进行。

Photoflash'bulbs which usually have a duration of about 20 milliseconds above half peak intensity can be used either singly or flashed in sequence.

光强能在大约20毫秒持续时间内保持在半峰值以上的闪光灯，既可用于单次闪光，也可用于连续闪光。

For the climatic characteristics of the maintenance of the SCS summer monsoon, results show: 1 according to the 40-year means, the maintenance period of the SCS summer monsoon is around 25 pentads, i.

对于南海夏季风维持期的气候特征，研究发现：(1)就四十年平均而言，南海夏季风维持时间大约为二十五候约四个月。

It struck at around 5 pm local time, about 33 miles (53 kilometers) from Padang, the capital city of West Sumatra.

它发生在当地时间下午约5时，大约33英里（53公里），从巴东，首都西苏门答腊。

For this, the principle combined together according to the theories research and the fulfillment research, this text at topic set the foundation of activity research which carried on about three years up, the point which puts forward currently the study evaluation of the primary and junior high school foreign language reform should be, Be overing sex evaluation and formation evaluation to lay equal stress on under principle instruction, strengthen the research and the fulfillment which evaluates to the formation.

为此，基于理论研究和实践研究相结合的原则，本文在课题组进行了大约三年时间的行动研究的基础上，提出目前中小学外语学习评价改革的重点应当是，在终结性评价和形成性评价并重原则指导下，加强对形成性评价的研究和实践。

In the five years between 1965 and 1970, about 16,114 people from 119 communities left, and many of their outports, as those communities were called, vanished from the map.

在1965年到1970年之间的5年时间里，大约有来自119个居民区的16，114个人离家，很多这类称为&外港&的居民区自此从地图上消失。

The pumpkin seed has a very short shelf life and if you remove and wash the seeds yourself and place them on an oiled cookie sheet and roast them till dry, they are good for approximately a month.

南瓜籽的保质期很短，如果你自己摘下并清洗这些籽，最好平铺在抹了油的烤盘上进行烘焙，直到水分完全挥发，这样就能存放大约一个月的时间了。

The good things about wind resistance trainers is they are the cheapest, been around along time and they are simple in make up.

对风的阻力训练好的东西，这是他们最便宜的，时间大约沿着过去和他们简单弥补。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。