我们必须想象早期的地球是岩石材料、金属和封闭气的混合物，受到较小的星子的持续轰击，没有多少大气。
We must imagine the early Earth as a mixture of rocky materials, metals, and trapped gases, subject to constant bombardment by smaller planetesimals and without much of an atmosphere.
糟糕的是树熊似乎可以永远闭气。
Unfortunately, it seems that koalas can hold their breath indefinitely.
我总能闭气很长一段时间而不会气喘吁吁。
I've always been able to hold my breath for a long time without having to do the hyperventilating.
当然，有经验的使用者通常会选择关闭气球。
Of course, experienced users would usually keep balloon help off.
为什么关闭气泡水的时候没有泡沫出现？ ？
它们用快速开闭气孔的方式来发出这些声音。
They make these sounds by rapidly opening and closing their blowhole.
请闭气一下！
高膛压闭气机构的设计原则是避免构件发生塑性变形。
Design principle of Obturation mechanism in high pressure is to avoid structural component from plastic deformation.
当这发生时，气门弹簧紧紧地封闭气门口，叫做气门座。
As this occurs, valve springs pull the valve tightly closed against its opening, called the valve seat.
当这发生时，气门弹簧紧紧地关闭气门口，叫做气门座。
As this occurs, valve springs pull the valve tightly closed against its opening, called the valve seat.
抢救者用口或CPR袖珍面罩封住病人口唇，形成一个密闭气道。
Place rescuer's mouth or CPR pocket mask over client's mouth, forming an airtight seal.
该方法考虑了闭气环与衬套之间的摩擦力，比常规方法更接近实际；
Taking into account the friction force between obturator ring and liner, this approach is closer to the real condition than the conventional one.
根据对高压气体绝热流动规律的分析，建立了闭气试验定量数学模型。
On the basis of analysis of thermal insulating flow for high pressure air, the quantitative mathematical model for closed air test was built.
文中结合闭气装置工作环境，对火箭发动机的闭气装置性能进行了分析。
In this paper obturator performance of rocket engine is analyzed according to work environment.
闭水试验和闭气试验是无压管道进行严密性试验最常采用的两种试验方法。
Two commonly used methods of pressurization test of pipelines with free-surface in best common are close water test and close gas test.
像海洋哺乳动物一样，赫特族能将他们的鼻孔密闭起来，而且能长时间闭气。
Like aquatic sea mammals, Hutts are able to seal their slit-like nostrils, and Hutts can hold their breaths for significant lengths of time.
此时，电机m停止运转，保险爪因电磁气阀d Q断电关闭气路而落在保险齿条上。
At this time, the motor m stops running, and the insurance jaw falls on the insurance rack for the solenoid valve DQ is power off and closes the air course.
基于气田的物质平衡方程序，在本文中提供了确定定容封闭气田地质储量的诺模图。
A nomograph for determining gas in place (GIP) in a closed gas field is presented in this paper based on the material balance equation.
采用密闭气室间歇式抽气法研究了黄河上游灌区不同施肥处理下稻田氨挥发损失特征。
The batch-type airflow enclosure method was adopted to measure the ammonia volatilization (AV) from paddy field under different fertilization rates in irrigation area of the Yellow River .
游离相天然气在从运移到聚集和保存的过程中，通常存在着深盆气藏和常规圈闭气藏两种机理模式。
The typical deep basin gas accumulation is usually of the properties of piston_typed migration way, up grow_typed accumulation and actively dynamic preservation models, whi.
游离相天然气在从运移到聚集和保存的过程中，通常存在着深盆气藏和常规圈闭气藏两种机理模式。
There are two typical kinds of mechanisms and models for gas migration, accumulation and preservation, including deep basin or basin centered gas accumulations and generally trapped gas accumulations.
我不知道树熊在水下可以闭气多久，我只知道如果它不放开我，我们就会一直呆在水下，最后一同溺毙。
I didn't know how long a koala could hold its breath but as far as I was concerned we were both staying down until the koala let go or we both drowned.
以正常压力系统封闭气藏的物质平衡方程序为基础，建立一种利用累积产气量计算气藏地层压力的方法。
On the basis of the material balance equation, this paper develops a method to predict the formation pressure using cumulative production data for normal pressure confined gas reservoir.
利用液压挺杆内部独特的结构设计，可自动调节配气机构传动间隙、传递凸轮升程变化、准时开闭气门。
Using hydraulic valve plunger interior unique structural design, but automatic control timing mechanism transmission gap, transmission lift of CAM change, punctual make and break tire valve.
高温烧结时，一方面，熔化的玻璃相被封闭气孔中的气体穿过形成贯穿大孔洞，削弱高温烧结时的力学性能；
In high temperature sintering , on the one hand, big across hole is formed by gas closed in porosity that passes through molten glass phase, and mechanical properties is declined.
在点火不成功、意外熄火。燃气用完等情况下，能在0.5秒内自动关闭气阀，并发出声光警告，安全可靠。
In case of lighting failure, flameout and gas using up etc, the mechanism turns off the gas valve in 0.5s automatically with light and sound alarm, safe and reliable.
在点火不成功、意外熄火。燃气用完等情况下，能在0.5秒内自动关闭气阀，并发出声光警告，安全可靠。
In case of lighting failure, flameout and gas using up etc, the mechanism turns off the gas valve in 0.5s automatically with light and sound alarm, safe and reliable.
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