瓶颈

It is known that the infrastructure construction is a prominent problem of society economy and politics in the world.

众所周知，公共基础设施的建设是当前许多国家突出的社会、经济和政治问题，是国民经济发展的&瓶颈&。

The fourth section probes into the acting mechanism of venture capital on the US New Economy. Except for solving the innovation bottleneck for medium-and-small-sized enterprises, venture capital constructs a risk-sharing mechanism for the New Economy by means of a finer division of labour and through a well-knitted network of financial medium service.

第四节探讨风险投资对美国新经济的作用机制，除解决了中小企业进行创新的资金瓶颈之外，风险投资解决了科技从公共产品向生产要素的转化，还通过投资银行、会计师事务所等服务中介，以更精细的社会分工组织形式，为新经济建立了一套风险共担机制。

But the turbine flow classifier used widely in industry can not be satisfied with the requirements of high quality Sn-Pb welding powder.

工业上广泛使用的涡轮式气流分级机，由于内部有高速旋转的转子，使粉体分级时热运动加剧，增加了粉体氧含量，因此粉体品质难以得到保证，这是涡轮式气流分级机在高品质Sn-Pb焊粉分级应用中的最大技术瓶颈。

Place the funnel with the filter paper and the precipitate in the neck of a 50mL volumetric flask.

将置有滤纸和沉淀物的漏斗置于50ml容量瓶瓶颈处，使用EDTA饱和的20％的氢氧化钠溶液清洗，然后使用蒸馏水清洗并定容。

Place the funnel with the filter paper and the precipitate in the neck of a 50mL volumetric flask. Dissolve the precipitate by washing the paper with 20% sodium hydroxide solution saturated with EDTA.

将置有滤纸和沉淀物的漏斗置于50ml容量瓶瓶颈处，使用EDTA饱和的20％的氢氧化钠溶液清洗，然后使用蒸馏水清洗并定容。

The core of Check vector method is: Inserting check vector in the critical area and dimensions, and tool only simulating these area.

本文，对于这两个瓶颈，本文提出利用测试矢量的方式，在设计版图的关键尺寸和关键区域插入测试矢量，并且只模拟这些区域的版图，以减少版图模拟的时间，优化了整个光刻规则的实现。

How to effectively condensing zinc vapor into liquid in condenser influences the development of zinc refinery technology all through.

冷凝器如何有效的将锌蒸气冷凝为液态，一直是锌精炼工艺的瓶颈。

By analyzing the torsion pendulum system's work theory and automatic measuring method, develop a suit of automatic stiffness measuring system for torsion bar, which realize torsion bar's automatic measuring, resolve the difficult in the torsion bar's produce process, improve torsion bar's produce efficient, satisfy torsion bar's passel produce request.

通过对扭摆系统的工作原理和自动测量的方法进行研究，开发了一套扭杆刚度自动测量系统，实现了扭杆刚度的自动测量，解决了扭杆生产中的瓶颈，提高了扭杆的生产效率，满足了扭杆批生产的要求。

Seed cells are acting as one of the key factors in tooth tissue engineering.

如何构建具有生物活性的组织工程化牙根是当前牙齿再生研究中的一个&瓶颈&问题，直接关系到牙齿组织工程的成败和最终走向。

Though many researchers have been working on tar removal, the efficient and cheap removal of tar is still immature and the main technical barrier for the successful commercialization of biomass gasification technology. Some research indicate that oxidation of tar produces light C1-2 hydrocarbons that can reduce NO, which means that tar can reduce NO.

由于焦油凝结、形成烟雾、聚合成更复杂的结构，造成生物质气化气输送管道的堵塞，损害内燃机和燃气轮机，因而焦油成为限制生物质气化技术应用的瓶颈。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。