The key difference here is that messages placed in a topic include a parameter that defines the message durability (how long it should remain on the server awaiting subscribers).
这里关键的不同在于放在一个主题中的消息包括了一个参数，这个参数定义了该消息的耐久性（它能够在服务器上等待订阅者多长时间）。
Landscape stone with a long history of the former in the phenomenon, has high strength, good decorative, high durability, the advantages of the origin is widely.
园林石在现象中有着悠长的前史，具有强度高、装饰性好、耐久性高、来历广泛等优势。
Its slip resistance and durability provide stability and long term wearability.
它的滑性和耐久性提供稳定和长期的耐磨性。
For a modern structure with the requirement of long durability, the technology improvement and quality control system are interdependent.
对于有长期耐久性要求的现代工程结构来说，技术的改进和质量保证体系是密不可分的。
On the other hand, the Seepage of the concrete would also accelerate the deterioration of the concrete, and put evil forth on the long-term safety and durability of it.
混凝土渗透反过来又会加速和促使混凝土的进一步恶化，严重影响其结构的长期安全和耐久运行。
Cement concrete pavement has a high strength, good stability, good durability, long life and daily maintenance costs.
水泥混凝土路面具有强度高，稳定性好，耐久性好，使用寿命长，日常养护费用少等特点。
The process of hydration and solidification of young concrete have a significant influence on the long term strength and durability of concrete.
早龄期混凝土的水化、凝结过程对混凝土的后期强度、耐久性是非常重要的。
Baby Jogger's unique manufacturing process ensures unsurpassed quality, unparalleled safety and long term durability.
宝贝慢跑公司独特的制造工艺过程确保卓越的质量，绝对的安全以及长期的耐久性。
Long-lasting serrated forged steel blades for superior strength and durability. Hard, colored material for toughness and durability.
加硬材料，颜色鲜艳，坚固耐用。锯齿纹钢铁锻造刃口，力量非凡，坚固耐用。
PVC Goodyear Welt joins the upper, insole, midsole and outsole for long-wearing strength and durability.
PV C材料的固特异贴边将表层、鞋垫、鞋底夹层和鞋底连接起来，提供了良好的耐久性。
Excellent high temperature performance, long service life in high-temperature, high temperature working conditions with good durability.
优异的高温性能，长得高温使用寿命，在高温工作环境下具有良好的耐久性。
Crack, the common problem existing in concrete material, is one of the main reasons which influence the long-term durability of concrete structure.
裂缝是混凝土材料普遍存在的问题，也是影响混凝土结构长期耐久性的主要原因之一。
Hydrodynamic acoustic generators have long been in use for acoustic processing, due to their low cost, simple construction, durability and convenient power source.
流体动力式声波发生器是一种有着悠久历史的声处理发生器，具有成本低廉、结构简单、坚固耐用以及动力源方便等特点。
Because of the durability of vinyl, products made from this material have a long life span.
由于“乙烯基”的耐久性，这种材料制成的产品具有很长的寿命。
It has a long term economic benefit and social benefit to guaranteed pumping concrete durability and building reasonable service life.
对保证泵送混凝土的耐久性和建筑物的合理使用寿命有长远的经济效益和社会效益。
The use of landscape stone has a long history, natural stone is the old building materials, has high strength, good decorative, high durability, sources, etc.
景观中石材的运用由来已久，天然石材是古老的建筑材料，具有强度高、装饰性好、耐久性高、来源广泛等特点。
Cement concrete pavement has high strength, good stability, good durability and long service life, few daily maintenance cost and advantages for night driving.
水泥混凝土路面具有强度高，稳定性好、耐久性好、使用寿命长、日常养护费用少，且有利于夜间行车等优点。
Its of high floor durability and long service life, and can save maintenance cost by a big margin.
地坪耐用性高，使用寿命长，大幅节省维护费用。
Using this class of composites, it is potential to solve the structural problems inherent with today's typical concrete structures, such as security and long term durability.
将该材料应用于混凝土结构，有望解决现代混凝土结构所面临的安全性和耐久性等问题。
This specialty elastomer exhibits high flex and tear resistance to provide excellent durability and long life.
这种专业弹性材料具有高弯曲度和抗撕裂性，因此更加经久耐用。
The utility models characterized by simple structure, durability, low cost, appropriately selection of the open Angle, safe and convenient use, long service life, so it can be popularized to use.
本实用新型具有结构简单，坚固耐用，使用成本低，可任意开合并固定在选用的角度，使用安全方便，使用寿命长，可推广使用。
Our timers have the best reliability and long life durability in the world.
我们的定时器产品具有世界一流的可靠性和最长的使用寿命。
Parts are all precisely processed by computerized digital control machine tools. The mechanical action is flexible and stable, with excellent durability, complete function and long service life.
零部件均由电脑数控机床精密加工，机械动作柔和稳定，耐久性卓越，功能齐全，使用寿命长。
It is equipped with the original compressor of Europe or US and the pump of Italy, featuring low operating noise, electricity saving, perfect durability and long service life.
采用欧美原装进口压缩机及意大利水泵，运行噪音低，省电耐用，使用寿命长。
The low durability of a bamboo culm towards biodeterioration in an exposed environment requires mostly a protection with chemical solutions for long time use.
由于在露天环境中遭遇生物腐蚀，竹秆的持久性差，所以需要采取化学手段增强其耐力。
It is equipped with the original compressor and the water pump imported from the Europe or USA, featuring low operating noise, electricity saving, perfect durability and long service life.
采用欧美原装进口压缩机及进口水泵，运行噪音更低、省电耐用、使用寿命长。
The test cycle is too long if the natural environment is used to evaluate materials durability. The evaluation test can not meet the requirements of design, testing, setting in short term very well.
若通过自然环境试验考核涂层材料的耐候性，则试验周期太长，在很多时候不能很好满足设备在短期内完成设计、试验、定型的要求。
The pressure cell installed under road is required fo have the properties of durability and reliability for long-term monitoring of the stability of railway subbase.
在铁路路基稳定性长期监测研究中，要求埋设于路堤之下的压力盒具备耐久、可靠、可供长期使用的特点。
The pressure cell installed under road is required fo have the properties of durability and reliability for long-term monitoring of the stability of railway subbase.
在铁路路基稳定性长期监测研究中，要求埋设于路堤之下的压力盒具备耐久、可靠、可供长期使用的特点。
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