haphazard ignition

用法例句

Fuzzy comprehensive evaluation on the spontaneous combustion in goaf and its application;

模糊综合评价对采空区自然发火的评价及应用

Study on spontaneous combustion in Gob of fully mechanized mining with top coal caving face;

综放面采空区遗煤自然发火特性研究

Temperature measurement system for coal spontaneous combustion experiment;

煤自然发火实验温度监测系统

The paper introduces the application of the thermometry for the research of spontaneous ignition in Jianxin Colliery,and makes a further study on the regularity of temperature change in the goaf behind the working face in the process of advancement,which has provided the scientific basis for the colliery against the spontaneous ignition.

通过介绍测温法在建新矿自然发火规律研究中的实践运用,进一步摸索采煤工作面推进过程中采空区后方的温度变化规律,为矿井采取有效的防自然发火措施提供科学依据。

In addition,the time series prediction model based on BP neural network was also set up by using of forecasting indexes of goaf spontaneous ignition.

对采空区煤炭自然发火进行了危险性评价,从自然发火条件入手,建立采空区自然发火事故模型,确定采空区发火现状危险等级为C级,较危险;利用采空区已有的自然发火预测指标建立BP神经网络的时间序列预测模型,对未来该采空区有无发火危险进行了预测,确定未来采空区发火可能性大小。

A forecast model of the coal spontaneous combustion in mine concerned the time sequences was established based on gray theory.

指出了矿井自然发火及其预测对安全生产的重要性。

The paper pointed out the coal mining method in medium thick seam and thick seam having critical influences to the "one ventilation and three preventions" managements, specially the gas emission, coal spontaneous combustion and others.

论述回采技术选择与瓦斯涌出、自然发火防治之间的关系,指出中厚以上煤层采煤方法的选择对“一通三防”管理,尤其是瓦斯涌出、自然发火防治有着至关重要的影响,并用例说明必须选择合适的回采方法,以保证煤炭的安全生产。

The quality or condition of being fortuitous.

偶然性,偶然偶然发生的性质或状态

Some liabilities are contingent.

有些债务是偶然发生。

Occurring unexpectedly, unintentionally, or by chance.

意外的，偶然发生的

Happening by accident or chance.

偶然发生的因某种事件或机会而发生

Was this designed, or did it just happen?

这是预先计划的呢，还是偶然发生的？

Only occasionally a hubbub of altercation rises to the skies.

只是偶然发生口角，大声地吵闹。

anything that happens by chance without an apparent cause.

没有明显原因的偶然发生的事。

Agreement on the Prevention of the Accidental Outbreak of Nuclear War

关于防止偶然发生核战争协定

Something unpleasant which happen by chance(such as the crash of a plane.

偶然发生的令人不愉快的事，如飞机坠毁。

Something unpleasant which happens by chance such as the crash of a plane

偶然发生的令人不愉快的事，如飞机坠毁

Except for one minor incident, he seemed to be in excellent health.

他除了偶然发生过一次小病外，似乎非常健康。

That sort of thing is quite occasional and not the rule.

那种事情很偶然，并不经常发生。

In the nature of things, there is bound to be the occasional accident.

从道理上说, 肯定会有偶然事故发生。

Involuntary terminations must be reported concurrent with the termination.

偶然终止必须告知发生终止的事件。

Stainless steel, however, does not rust. And its invention or discovery was accidental.

但是不锈钢不生锈，而它的发明或发现是偶然的。

An occasional outburst of anger creates wrinkles on the face.

一次愤怒的偶然爆发会在脸部产生皱纹。

Occasionally, however, there are inventions which change the way we live.

然而，偶尔有发明会彻底改变我们的生活方式。

I found out by chance that she was actually a freshman from London University.

我偶然发现她实际上是伦敦大学的一年级学生。