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The protective modules energize and de-energize the solenoid pull coil within approximately 1.5 seconds.

保护模块的活力和德活力螺线管线圈拉在大约1.5秒。

While (superscript 4) He is the decay product of uranium and thorium, mainly concentrated in the continental crust, and is approximately proportional to the heat flux of crust.

由於铀、钍元素在大陆地壳中富集，(上标 4) He通量与地壳热流呈正相关关系；同时(上标 3) He通量与地幔热流之间呈正相关。

The lower berth in a double tier should be not less than 30 centimetres above the floor; the upper berth should be placed approximately midway between the bottom of the lower berth and the lower side of the deckhead beams.

如安置双层床，则下床在地面上的高度不应小于30厘米；上床应大约位于下床床板与天花板甲板梁底部的中间位置。你知道它的英文吗？

The dimensions of the DDG-1000's seven-level deckhouse are approximately 160 ft long by 70 ft wide by 65 ft high (48.8m by 21.3m by 19.8m).

DDG-1000七层舱面船室的规格大约为：长160英尺（48.8米），宽70英尺（21.3米），高65英尺（19.8米）。

The deckhouse superstructure - approximately 130 ft long by 60 ft wide by 40 ft high (39.6m by 18.3m by 12.2m)- contains advanced radar systems, and a mission planning/control center.

舱面船室上层结构的规格约为：长130英尺（39.6米），宽60英尺（18.3米），高40英尺（12.2米），其中包括先进的雷达系统及一个任务计划或控制中心。

Decompose at approximately 400℉(204℃), but does not affect the performance of

和剂约在400°F (204°C)时会开始分解，却不影响其套管的功能。

It has far more influence than carbon dioxide on the greenhouse effect, approximately 300 times of the later one, and it takes about 120 years to decomposite.

一氧化碳的温室效果是二氧化碳的300倍，在大气中完全分解需要120年。

In static analysis, small deflection theory of circular plate and electrostatic actuating theory are adopted to simulate electrostatic-structural coupled process. In modal analysis, harmonic response analysis and nonlinear transient dynamic analysis of pump membrane, the fluid in the pump is regarded as an additional mass acting on the pump membrane to approximately substitute the effect of fluid field on pump membrane, which reduces the amount of calculation and improves simulation efficiency.

其中在静态分析中，利用圆型薄板的小挠度变形理论和微机电系统中的静电力驱动理论来模拟静电－结构耦合过程；在泵膜的模态分析、谐响应分析以及非线性瞬态分析中，把腔内的流体当作附加质量作用在泵膜上，近似代替流场对泵膜的影响，从而减小计算量，提高了仿真效率。

In a this tube pair of deflection plate, besides demonstration electron under electric field role deflection movement, but also played causes the beam convergence the function, if causes two deflection plates the electric potentials to be lower than the acceleration extremely electric potential approximately 30 volts, then the focusing condition is best.

该管内的一对偏转板，除了演示电子在电场作用下的偏转运动外，还起了使电子束会聚的作用，如使两偏转板的电位低于加速极电势约30伏，则聚焦状态最佳。

Approximately 80% of the city's smog originates from other parts of the Pearl River Delta.

大约80 ％的城市的烟雾来自其他地区的珠江三角洲。

It was just a normal day of school

那只是上学的普通一天

Which is a very good reference in this issue.

这是一个在这个问题上很好的参考。