有效限制

However, vascularized bone autograft can't provide suitable donor for big mass bone defect, large segment defect and bone defect with joint because of limitation of quantity, size, shape etc of donor. So, people thinks of vascaularized bone allogeneic transplantation .

不过，因受供体数量、规模、形体等因素的限制，对于大块、大段以及包括关节的骨缺损，带血供之自体骨移植，颇有力不从心之感，而同种异体骨移植的实行，似可提供一种新的、有效的手段。

During 6:00-10:00 o'clock period, climbing of photosynthetic rate P(subscript n was primarily caused by photosynthetic active radiation, leaf temperature, relative humid. Descending photosynthetic rate P(subscript n from 10:00 o'clock to 14:00 o'clock, especially "middy depression" was mostly caused by stomata factor.

早晨6：00-10：00期间，光合速率的上升主要是光合有效辐射、温度和相对湿度造成的。10：00-14：00期间，光合速率的降低，尤其是"午休"期间的下降，气孔因素是主要限制因子。

The research result shows that the flowability, moldability, cohesiveness of high performance concrete of hill sand are significant by comparison with ordinary concrete on mechanical properties, long term properties, and durability. Motar flowability decreases with the increase of single-mixed active additive. The flowability can be largely improved by double mixing of active additive and super plasticizer NF. This is because not only the active additive has filling effect but also the dispersing effect induced by surface action between additive and super plasticizer NF. And the optimal content of materials are: super plasticizer NF≥0.8%, fly ash 20%, PS 20~30%,zeolite powder≤20%,SF 5~8%; The negative influence of hill sand powder should be avoided by controlling of powder content and the use of active additive and super

研究表明：随着单掺活性掺合料掺量的增加，砂浆流动性减小，活性掺合料与萘系高效减水剂NF双掺使用，比使用同样剂量萘系高效减水剂NF的基准浆体流动性明显增大，这是由于玻璃体材质活性掺合料不仅有填充效应，更主要的是它与高效减水剂之间的表面物化作用产生了分散性，而活性掺合料对浆体的流化作用效果主要是依赖于其分散性；能有效改善胶砂流动性的适宜掺量为：萘系高效减水剂不小于0.8%，粉煤灰掺量为20%，PS掺量为20~30%，沸石矿粉掺量不宜大于20%，SF掺量为5~8%；通过对粉末含量的限制，并借助活性掺合料、高效减水剂的合理使用，就可以避免山砂粉末含量的负面影响，配制出密实度高，抗渗性能优异，具有良好的耐久性能，并具有良好的体积稳定性的山砂高性能混凝土。

The purpose, he said, is not to limit immigration but to create a system in which the process of naturalization works.

他解释说，测试的目的不是要限制移民，而是要创造一种在正式加入国籍过程中有效发挥作用的系统。

Nomina oblita remain available names; see Articles 23.9 and 23.12 for conditions controlling their use as valid names.

被遗忘名称仍为适用名称；见第23条9和第23条12关於限制其用作有效名称的条件。

While the strict integrity policy of Biba's model can be used to maintain integrity of data in computer systems, the integrity labels of both subjects and objects in a system are always kept static in SIP, which might lead to denial to some non-malicious access requirements and hence decreases the compatibility of applications Dynamic enforcement of this policy is presented, which can increase compatibility of software while keeping system integrity as strictly as SIP can The implementation of...

Biba模型中的严格完整性政策能够有效地保证数据的完整性，但是该政策中主体和客体的完整性标记都是静态不变的，这会限制进程的一些原本合理的活动，从而降低应用程序的兼容性。提出严格完整性政策的动态实施方案，并给出该方案在基于Linux的安全操作系统RFSOS中的实现。该方案既可以保证系统的完整性，又能提高系统的兼容性。实验证明，这种方案对系统的整体效率的影响小于1%。

Others believe that effective development of software relies on understanding unique constraints of each problem, and so universal notations are doomed because each provides a notational bias that necessarily makes the notation useless or dangerous for some set of tasks.

还有人认为，有效的软件开发依靠独特的理解，每个问题的限制，所以普遍的符号，是注定，因为每个提供notational偏见必然使符号无用或危险的某些规定的任务。

Impurities control is one of the most important factors of limiting plasma discharge in Nuclear Fusion research.

杂质控制一直以来都是受控热核聚变中限制等离子体有效运行的重要因素。

This method the effective limit, the single nucleus nuclear fusion will release energy.

这种方法将有效的限制，单核核聚变所释放的能量。

However, because of some limitations such as City and countryside binary structure; Census register system; Economy condition of themself etc, they are out of oppidan treatment. Some migrate workers take their children into cities with themself from countryside because of all different trouble. In this way their children become a newfeeblenesscolony—floating children in cities.

但是由于受到城乡分割的二元社会结构体制和自身经济条件的限制，他们无法享受到和城里人相同的待遇，然而他们出于割舍不下对孩子成长的关心或苦于在家乡找不到能代替他们对孩子有效行使监护责任的合适监护人等原因，将自己的孩子也带进了他们的打工地——城市，从而产生了一个新的弱势群体——城市流动儿童。

If you are unfortunate enough to the lovelorn, please tell me, I will help you out, really, please contact me!

如果你不幸失恋了，请告诉我，我会帮助你摆脱困境，真的，请联系我啦！

China's plan to cut energy intensity by 20 percent and pollutant discharges by 10 percent between 2006 and 2010 is a case in point.

中国计划在2006年到2010间降低20%的能源强度和减少10%的主要污染物排放，就是一个这样的例子。