Messier 27 (M27) is an excellent example of a gaseous emission nebula created as a sun-like star runs out of nuclear fuel in its core.
Messier27 (M27)是个气体发射星云的典型例子，它是由于类似太阳的恒星耗尽了其核心的核燃料而产生的。
The emission wavelength of QDs was controlled by the size of the core and each single-color of QDs has narrow symmetrical emission peak.
量子点的发射波长取决于核心粒子的大小，而每一种单色量子点的发射波长窄而对称。
In the elements of landscape architecture construction, plant and plant landscape are the core elements that are closely related to the emission and absorption of carbon dioxide.
在风景园林建设要素中，植物和植物景观是与二氧化碳排放和吸收都密切相关的核心要素。
As the core content of vacuum microelectronics, the performance of field emitter array (FEA) directly influences the whole performance of field emission device.
场发射阵列阴极(FEA)作为真空微电子学的核心内容，其性能的好坏直接影响着场发射器件的总体性能。
Student 3: Do you consider the restriction of the emission of carbon dioxide a core method, and what's your opinion on radical solution of global warming?
学生三：您认为限制二氧化碳排放是主要的办法么？全球气候变暖问题的治本之策是什么？
Carbon Capture Storage (CCS), energy conservation and emission reduction in production and and the development of renewable energy are the three core issues in developing low-carbon economy.
二氧化碳捕集—封存、生产生活中的节能减排和可再生能源的开发是实施低碳经济的三个核心举措。
Through compaction hardness and analog shear rock failure test to drilling core, the paper discusses the possibility of discriminating downhole rock type by using rock acoustic emission frequency.
通过对钻井取心岩样压入硬度及模拟剪切的破岩试验，探寻利用岩石的声发射频率来判别井下岩石类型的可能性。
To use the drilled coal core site desorption data can get a drop-down curve of abandoned mine methane emission rate versus time approximately.
用钻孔煤心现场解吸数据可以近似得到废弃矿井甲烷涌出速度对时间的下降曲线。
The optimal control algorithm targeting at reducing emission in transient state is the core of the study, and the torque coordination control between the engine and the motor serves as a basis.
以降低瞬态过程排放为目标的优化控制算法是本文的核心研究内容，柴油机和电机的转矩协调控制是降低排放的基础。
However, there are many problems to improve the emission trading system. The core problem is how to scientific allocate the initial emission rights rationally.
然而，要想完善排污权交易制度，目前还存在很多问题，其中最需首要解决的问题就是如何合理公平的分配排污权。
However, there are many problems to improve the emission trading system. The core problem is how to scientific allocate the initial emission rights rationally.
然而，要想完善排污权交易制度，目前还存在很多问题，其中最需首要解决的问题就是如何合理公平的分配排污权。
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