热和

The results show that the plasticity zone and dynamically quiescent layer become fine equiaxed recrystallisation under the thermo-mechanical effect, the grains in the heat-affected zone grow up because of the effect of friction heat. When the rotation speed is 2 500 r/min and the welding time is 12 s, good joint is achieved, and the tensile shear strength of the joint reaches 9.24 kN. The tensile shear strength of spot increases with increasing tool rotation speed, with increasing welding time, the strength increases first, while then reduces. The microhardness of plasticity zone is high, but is slightly lower than that of the base metal, the minimum value of microhardness is in the heat affected zone. When the energy input of joint is high, the fracture type of spot is mode Ⅰ, and the tensile shear strength is high; on the contrary, when the energy input of joint is less the fracture type of spot is mode Ⅱ, and the strength is low.

结果表明：塑性区和动态静止层的晶粒在热和力作用下发生动态再结晶形成细小的等轴晶，热影响区的晶粒在摩擦热作用下长大变粗；搅拌头旋转速度为2 500 r/min，焊接时间为12 s时，可以获得力学性能较好的焊点，焊点的剪切强度达到9.24 kN；焊点的剪切强度随搅拌头旋转速度的增大而增大，随焊接时间的延长先增大后减小；塑性区的显微硬度较高，但略小于母材，接头显微硬度的最小值分布在热影响区；焊点热输入量较多时，接头为Ⅰ型断裂，焊点的剪切强度较高；焊点热输入量较少时，接头为Ⅱ型断裂，焊点的强度较低。

Heat and cold can help alleviate pain too, but since moist heat, such as that from a bath, acts differently than the dry heat of a heating pad or the cold of an ice pack, this type of treatment needs to be discussed with a doctor or physical therapist.

热和冷能帮助减轻疼痛太多，但由于湿热，如从一个浴池，行为不同于干热供暖垫或寒冷的冰袋，这种类型的治疗需要讨论的医生或物理治疗师。

The differential scanning calorimetry and thermal gravimetric analysis exhibited that the transition temperature and the temperature at which 5% mass loss occurred of PI-19 were 256 ℃ and 380 ℃, respectively.

示差扫描量热和热失重分析结果显示，PI-19的玻璃化转变温度为256 ℃，在5%的热失重温度为380 ℃，表明具有非常好的热稳定性。

The closure error of energy shows that neither of the rice paddy and the dry farming land is not closed with average 10% error during the observed period.

由此可见，稻田的潜热比旱地大一倍左右，旱地的感热和土壤热传导比稻田大。

The Simulation results indicate:(1) Exchanging of sea-air and force of dynamical and thermodynamic processes is very important to bring and maintain sea surface wind .SHF is mostly energy sources and LHF is negative effect in some area.

模拟结果充分表明：(1)感热和潜热的海气交换和动量交换对于海面风的发展和维持起着重要作用，潜热加热是海面风中最主要的能源，感热通量在一武汉理工大学硕士学位论文定区域对海面风风场有负面影响。

In the 6th century B.C., Parmenides thought of memory as being a mixture of light and dark or heat and cold!

在公元前6世纪，Parmenides认为记忆是光和暗，或热和冷的混合物！

Pahang's climate is characteristic of the tropics - hot and humid all the year round with distinct wet and dry season that coincides with the wet seasons from the South China Sea.

Pahang的气候终年是典型的热带-热和潮湿与与从南中国海的雨季相符的分明干湿的季节。

To produce snow requires both heat and cold;the first to evaporate ,the second to condenseJohn Lubbock.

雪的形成需要热和冷两个条件；前者起蒸发作用，后者起凝结作用。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。